390475231 has 2 divisors, whose sum is σ = 390475232. Its totient is φ = 390475230.

The previous prime is 390475219. The next prime is 390475249. The reversal of 390475231 is 132574093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390475231 - 2²¹ = 388378079 is a prime.

It is a super-2 number, since 2×390475231² = 304941812049006722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390475031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195237615 + 195237616.

It is an arithmetic number, because the mean of its divisors is an integer number (195237616).

Almost surely, 2^390475231 is an apocalyptic number.

390475231 is a deficient number, since it is larger than the sum of its proper divisors (1).

390475231 is an equidigital number, since it uses as much as digits as its factorization.

390475231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 390475231 is about 19760.4461235064. The cubic root of 390475231 is about 730.9109981387.

The spelling of 390475231 in words is "three hundred ninety million, four hundred seventy-five thousand, two hundred thirty-one".