363633661 has 4 divisors (see below), whose sum is σ = 366851772. Its totient is φ = 360415552.

The previous prime is 363633643. The next prime is 363633737. The reversal of 363633661 is 166336363.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42328036 + 321305625 = 6506^2 + 17925^2 .

It is a cyclic number.

It is not a de Polignac number, because 363633661 - 2²³ = 355245053 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 363633661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (363637661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608886 + ... + 1609111.

It is an arithmetic number, because the mean of its divisors is an integer number (91712943).

Almost surely, 2^363633661 is an apocalyptic number.

It is an amenable number.

363633661 is a deficient number, since it is larger than the sum of its proper divisors (3218111).

363633661 is a wasteful number, since it uses less digits than its factorization.

363633661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218110.

The product of its digits is 104976, while the sum is 37.

The square root of 363633661 is about 19069.1809210569. The cubic root of 363633661 is about 713.7640872038.

The spelling of 363633661 in words is "three hundred sixty-three million, six hundred thirty-three thousand, six hundred sixty-one".