390740131 has 2 divisors, whose sum is σ = 390740132. Its totient is φ = 390740130.

The previous prime is 390740107. The next prime is 390740137. The reversal of 390740131 is 131047093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390740131 - 2⁷ = 390740003 is a prime.

It is a super-2 number, since 2×390740131² = 305355699947794322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 390740131.

It is not a weakly prime, because it can be changed into another prime (390740137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195370065 + 195370066.

It is an arithmetic number, because the mean of its divisors is an integer number (195370066).

Almost surely, 2^390740131 is an apocalyptic number.

390740131 is a deficient number, since it is larger than the sum of its proper divisors (1).

390740131 is an equidigital number, since it uses as much as digits as its factorization.

390740131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 390740131 is about 19767.1477709861. The cubic root of 390740131 is about 731.0762451170.

The spelling of 390740131 in words is "three hundred ninety million, seven hundred forty thousand, one hundred thirty-one".