390757487 has 2 divisors, whose sum is σ = 390757488. Its totient is φ = 390757486.

The previous prime is 390757403. The next prime is 390757489. The reversal of 390757487 is 784757093.

It is a strong prime.

It is an emirp because it is prime and its reverse (784757093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 390757487 - 2²⁰ = 389708911 is a prime.

Together with 390757489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390757489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195378743 + 195378744.

It is an arithmetic number, because the mean of its divisors is an integer number (195378744).

Almost surely, 2^390757487 is an apocalyptic number.

390757487 is a deficient number, since it is larger than the sum of its proper divisors (1).

390757487 is an equidigital number, since it uses as much as digits as its factorization.

390757487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The square root of 390757487 is about 19767.5867773484. The cubic root of 390757487 is about 731.0870693371.

The spelling of 390757487 in words is "three hundred ninety million, seven hundred fifty-seven thousand, four hundred eighty-seven".