390903924161 has 2 divisors, whose sum is σ = 390903924162. Its totient is φ = 390903924160.

The previous prime is 390903924127. The next prime is 390903924251. The reversal of 390903924161 is 161429309093.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366394143025 + 24509781136 = 605305^2 + 156556^2 .

It is a cyclic number.

It is not a de Polignac number, because 390903924161 - 2²⁶ = 390836815297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (390903924661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195451962080 + 195451962081.

It is an arithmetic number, because the mean of its divisors is an integer number (195451962081).

Almost surely, 2^390903924161 is an apocalyptic number.

It is an amenable number.

390903924161 is a deficient number, since it is larger than the sum of its proper divisors (1).

390903924161 is an equidigital number, since it uses as much as digits as its factorization.

390903924161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 390903924161 in words is "three hundred ninety billion, nine hundred three million, nine hundred twenty-four thousand, one hundred sixty-one".