390937 has 4 divisors (see below), whose sum is σ = 392500. Its totient is φ = 389376.

The previous prime is 390893. The next prime is 390953. The reversal of 390937 is 739093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 739093 = 59 ⋅12527.

It can be written as a sum of positive squares in 2 ways, for example, as 55696 + 335241 = 236^2 + 579^2 .

It is a 3-Lehmer number, since φ(390937) divides (390937-1)³.

It is a cyclic number.

It is not a de Polignac number, because 390937 - 2⁷ = 390809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390899 and 390908.

It is not an unprimeable number, because it can be changed into a prime (390967) 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, 312 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (98125).

It is a Poulet number, since it divides 2³⁹⁰⁹³⁶-1.

2³⁹⁰⁹³⁷ is an apocalyptic number.

390937 is the 313-rd decagonal number.

It is an amenable number.

390937 is a deficient number, since it is larger than the sum of its proper divisors (1563).

390937 is a wasteful number, since it uses less digits than its factorization.

390937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 390937 is about 625.2495501798. The cubic root of 390937 is about 73.1199005381.

The spelling of 390937 in words is "three hundred ninety thousand, nine hundred thirty-seven".