401390523 has 12 divisors (see below), whose sum is σ = 610301640. Its totient is φ = 253509696.

The previous prime is 401390489. The next prime is 401390543. The reversal of 401390523 is 325093104.

401390523 is a `hidden beast` number, since 4 + 0 + 139 + 0 + 523 = 666.

It is not a de Polignac number, because 401390523 - 2¹⁷ = 401259451 is a prime.

It is a super-2 number, since 2×401390523² = 322228703908427058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401390543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1173486 + ... + 1173827.

It is an arithmetic number, because the mean of its divisors is an integer number (50858470).

Almost surely, 2^401390523 is an apocalyptic number.

401390523 is a deficient number, since it is larger than the sum of its proper divisors (208911117).

401390523 is a wasteful number, since it uses less digits than its factorization.

401390523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347338 (or 2347335 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 401390523 is about 20034.7329156143. The cubic root of 401390523 is about 737.6591007126.

The spelling of 401390523 in words is "four hundred one million, three hundred ninety thousand, five hundred twenty-three".