361622993 has 4 divisors (see below), whose sum is σ = 370443108. Its totient is φ = 352802880.

The previous prime is 361622971. The next prime is 361623023. The reversal of 361622993 is 399226163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399226163 = 7 ⋅57032309.

It can be written as a sum of positive squares in 2 ways, for example, as 147088384 + 214534609 = 12128^2 + 14647^2 .

It is a cyclic number.

It is not a de Polignac number, because 361622993 - 2¹² = 361618897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 8820073 = 361622993 / (3 + 6 + 1 + 6 + 2 + 2 + 9 + 9 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 361622993.

It is not an unprimeable number, because it can be changed into a prime (361622903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4409996 + ... + 4410077.

It is an arithmetic number, because the mean of its divisors is an integer number (92610777).

Almost surely, 2^361622993 is an apocalyptic number.

It is an amenable number.

361622993 is a deficient number, since it is larger than the sum of its proper divisors (8820115).

361622993 is an equidigital number, since it uses as much as digits as its factorization.

361622993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820114.

The product of its digits is 104976, while the sum is 41.

The square root of 361622993 is about 19016.3874855347. The cubic root of 361622993 is about 712.4460978203.

The spelling of 361622993 in words is "three hundred sixty-one million, six hundred twenty-two thousand, nine hundred ninety-three".