390470923 has 4 divisors (see below), whose sum is σ = 390550248. Its totient is φ = 390391600.

The previous prime is 390470887. The next prime is 390470933. The reversal of 390470923 is 329074093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329074093 = 59 ⋅5577527.

It is a cyclic number.

It is not a de Polignac number, because 390470923 - 2⁹ = 390470411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390470933) 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, 31753 + ... + 42298.

It is an arithmetic number, because the mean of its divisors is an integer number (97637562).

Almost surely, 2^390470923 is an apocalyptic number.

390470923 is a deficient number, since it is larger than the sum of its proper divisors (79325).

390470923 is an equidigital number, since it uses as much as digits as its factorization.

390470923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79324.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 390470923 is about 19760.3371175696. The cubic root of 390470923 is about 730.9083101525.

The spelling of 390470923 in words is "three hundred ninety million, four hundred seventy thousand, nine hundred twenty-three".