361399993 has 6 divisors (see below), whose sum is σ = 370001994. Its totient is φ = 352993536.

The previous prime is 361399937. The next prime is 361400021. The reversal of 361399993 is 399993163.

It can be written as a sum of positive squares in only one way, i.e., 190522809 + 170877184 = 13803^2 + 13072^2 .

It is a de Polignac number, because none of the positive numbers 2^k-361399993 is a prime.

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 361399993.

It is not an unprimeable number, because it can be changed into a prime (361399903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95880 + ... + 99577.

It is an arithmetic number, because the mean of its divisors is an integer number (61666999).

Almost surely, 2^361399993 is an apocalyptic number.

It is an amenable number.

361399993 is a deficient number, since it is larger than the sum of its proper divisors (8602001).

361399993 is an equidigital number, since it uses as much as digits as its factorization.

361399993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195543 (or 195500 counting only the distinct ones).

The product of its digits is 1062882, while the sum is 52.

The square root of 361399993 is about 19010.5232174183. The cubic root of 361399993 is about 712.2996210091.

The spelling of 361399993 in words is "three hundred sixty-one million, three hundred ninety-nine thousand, nine hundred ninety-three".