390369121 has 2 divisors, whose sum is σ = 390369122. Its totient is φ = 390369120.

The previous prime is 390369071. The next prime is 390369167. The reversal of 390369121 is 121963093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325405521 + 64963600 = 18039^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 390369121 - 2⁹ = 390368609 is a prime.

It is not a weakly prime, because it can be changed into another prime (390369191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195184560 + 195184561.

It is an arithmetic number, because the mean of its divisors is an integer number (195184561).

Almost surely, 2^390369121 is an apocalyptic number.

It is an amenable number.

390369121 is a deficient number, since it is larger than the sum of its proper divisors (1).

390369121 is an equidigital number, since it uses as much as digits as its factorization.

390369121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 390369121 is about 19757.7610320603. The cubic root of 390369121 is about 730.8447848118.

The spelling of 390369121 in words is "three hundred ninety million, three hundred sixty-nine thousand, one hundred twenty-one".