375007721 has 4 divisors (see below), whose sum is σ = 409099344. Its totient is φ = 340916100.

The previous prime is 375007697. The next prime is 375007741. The reversal of 375007721 is 127700573.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-375007721 is a prime.

It is a super-2 number, since 2×375007721² = 281261581619227682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (375007741) 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, 17045795 + ... + 17045816.

It is an arithmetic number, because the mean of its divisors is an integer number (102274836).

Almost surely, 2^375007721 is an apocalyptic number.

It is an amenable number.

375007721 is a deficient number, since it is larger than the sum of its proper divisors (34091623).

375007721 is a wasteful number, since it uses less digits than its factorization.

375007721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34091622.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 375007721 is about 19365.1160853737. The cubic root of 375007721 is about 721.1297342793.

The spelling of 375007721 in words is "three hundred seventy-five million, seven thousand, seven hundred twenty-one".