390090937 has 2 divisors, whose sum is σ = 390090938. Its totient is φ = 390090936.

The previous prime is 390090917. The next prime is 390090947. The reversal of 390090937 is 739090093.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379041961 + 11048976 = 19469^2 + 3324^2 .

It is a cyclic number.

It is not a de Polignac number, because 390090937 - 2¹⁵ = 390058169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390090937.

It is not a weakly prime, because it can be changed into another prime (390090917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195045468 + 195045469.

It is an arithmetic number, because the mean of its divisors is an integer number (195045469).

Almost surely, 2^390090937 is an apocalyptic number.

It is an amenable number.

390090937 is a deficient number, since it is larger than the sum of its proper divisors (1).

390090937 is an equidigital number, since it uses as much as digits as its factorization.

390090937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 390090937 is about 19750.7199109298. The cubic root of 390090937 is about 730.6711392136.

The spelling of 390090937 in words is "three hundred ninety million, ninety thousand, nine hundred thirty-seven".