399537 has 12 divisors (see below), whose sum is σ = 584064. Its totient is φ = 263160.

The previous prime is 399527. The next prime is 399541. The reversal of 399537 is 735993.

It is not a de Polignac number, because 399537 - 2⁶ = 399473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399527) 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, 712 + ... + 1142.

It is an arithmetic number, because the mean of its divisors is an integer number (48672).

2³⁹⁹⁵³⁷ is an apocalyptic number.

It is an amenable number.

399537 is a deficient number, since it is larger than the sum of its proper divisors (184527).

399537 is a wasteful number, since it uses less digits than its factorization.

399537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 537 counting only the distinct ones).

The product of its digits is 25515, while the sum is 36.

The square root of 399537 is about 632.0893924122. The cubic root of 399537 is about 73.6521905540.

The spelling of 399537 in words is "three hundred ninety-nine thousand, five hundred thirty-seven".