363645921 has 8 divisors (see below), whose sum is σ = 510380320. Its totient is φ = 229671072.

The previous prime is 363645911. The next prime is 363645941. The reversal of 363645921 is 129546363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 363645921 - 2¹⁸ = 363383777 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 363645921.

It is not an unprimeable number, because it can be changed into a prime (363645911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3189820 + ... + 3189933.

It is an arithmetic number, because the mean of its divisors is an integer number (63797540).

Almost surely, 2^363645921 is an apocalyptic number.

It is an amenable number.

363645921 is a deficient number, since it is larger than the sum of its proper divisors (146734399).

363645921 is a wasteful number, since it uses less digits than its factorization.

363645921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379775.

The product of its digits is 116640, while the sum is 39.

The square root of 363645921 is about 19069.5023794540. The cubic root of 363645921 is about 713.7721086920.

The spelling of 363645921 in words is "three hundred sixty-three million, six hundred forty-five thousand, nine hundred twenty-one".