390725723 has 4 divisors (see below), whose sum is σ = 392116488. Its totient is φ = 389334960.

The previous prime is 390725719. The next prime is 390725749. The reversal of 390725723 is 327527093.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327527093 = 3631 ⋅90203.

It is a cyclic number.

It is not a de Polignac number, because 390725723 - 2² = 390725719 is a prime.

It is a super-2 number, since 2×390725723² = 305333181227745458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390755723) 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, 694961 + ... + 695522.

It is an arithmetic number, because the mean of its divisors is an integer number (98029122).

Almost surely, 2^390725723 is an apocalyptic number.

390725723 is a deficient number, since it is larger than the sum of its proper divisors (1390765).

390725723 is a wasteful number, since it uses less digits than its factorization.

390725723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390764.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 390725723 is about 19766.7833245574. The cubic root of 390725723 is about 731.0672591993.

The spelling of 390725723 in words is "three hundred ninety million, seven hundred twenty-five thousand, seven hundred twenty-three".