390347131 has 2 divisors, whose sum is σ = 390347132. Its totient is φ = 390347130.

The previous prime is 390347129. The next prime is 390347141. The reversal of 390347131 is 131743093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390347131 - 2¹ = 390347129 is a prime.

It is a super-2 number, since 2×390347131² = 304741765359862322, which contains 22 as substring.

Together with 390347129, it forms a pair of twin primes.

It is equal to p_20848612 and since 390347131 and 20848612 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 390347093 and 390347102.

It is not a weakly prime, because it can be changed into another prime (390347141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195173565 + 195173566.

It is an arithmetic number, because the mean of its divisors is an integer number (195173566).

Almost surely, 2^390347131 is an apocalyptic number.

390347131 is a deficient number, since it is larger than the sum of its proper divisors (1).

390347131 is an equidigital number, since it uses as much as digits as its factorization.

390347131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 390347131 is about 19757.2045340428. The cubic root of 390347131 is about 730.8310614086.

The spelling of 390347131 in words is "three hundred ninety million, three hundred forty-seven thousand, one hundred thirty-one".