375636721 has 8 divisors (see below), whose sum is σ = 378560000. Its totient is φ = 372723120.

The previous prime is 375636697. The next prime is 375636731. The reversal of 375636721 is 127636573.

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

It is a cyclic number.

It is not a de Polignac number, because 375636721 - 2⁵ = 375636689 is a prime.

It is a super-2 number, since 2×375636721² = 282205892327263682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (375636731) 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, 88240 + ... + 92398.

It is an arithmetic number, because the mean of its divisors is an integer number (47320000).

Almost surely, 2^375636721 is an apocalyptic number.

It is an amenable number.

375636721 is a deficient number, since it is larger than the sum of its proper divisors (2923279).

375636721 is a wasteful number, since it uses less digits than its factorization.

375636721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839.

The product of its digits is 158760, while the sum is 40.

The square root of 375636721 is about 19381.3498239932. The cubic root of 375636721 is about 721.5326924151.

The spelling of 375636721 in words is "three hundred seventy-five million, six hundred thirty-six thousand, seven hundred twenty-one".