363564721 has 4 divisors (see below), whose sum is σ = 391531252. Its totient is φ = 335598192.

The previous prime is 363564689. The next prime is 363564757. The reversal of 363564721 is 127465363.

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 204804721 + 158760000 = 14311^2 + 12600^2 .

It is a cyclic number.

It is not a de Polignac number, because 363564721 - 2⁵ = 363564689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (363564781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13983246 + ... + 13983271.

It is an arithmetic number, because the mean of its divisors is an integer number (97882813).

Almost surely, 2^363564721 is an apocalyptic number.

It is an amenable number.

363564721 is a deficient number, since it is larger than the sum of its proper divisors (27966531).

363564721 is a wasteful number, since it uses less digits than its factorization.

363564721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27966530.

The product of its digits is 90720, while the sum is 37.

The square root of 363564721 is about 19067.3732066061. The cubic root of 363564721 is about 713.7189776962.

The spelling of 363564721 in words is "three hundred sixty-three million, five hundred sixty-four thousand, seven hundred twenty-one".