390960121 has 2 divisors, whose sum is σ = 390960122. Its totient is φ = 390960120.

The previous prime is 390960109. The next prime is 390960161. The reversal of 390960121 is 121069093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312016896 + 78943225 = 17664^2 + 8885^2 .

It is a cyclic number.

It is not a de Polignac number, because 390960121 - 2⁷ = 390959993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (390960161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195480060 + 195480061.

It is an arithmetic number, because the mean of its divisors is an integer number (195480061).

Almost surely, 2^390960121 is an apocalyptic number.

It is an amenable number.

390960121 is a deficient number, since it is larger than the sum of its proper divisors (1).

390960121 is an equidigital number, since it uses as much as digits as its factorization.

390960121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 390960121 is about 19772.7115237137. The cubic root of 390960121 is about 731.2134200807.

The spelling of 390960121 in words is "three hundred ninety million, nine hundred sixty thousand, one hundred twenty-one".