390883993672369 has 2 divisors, whose sum is σ = 390883993672370. Its totient is φ = 390883993672368.

The previous prime is 390883993672331. The next prime is 390883993672373. The reversal of 390883993672369 is 963276399388093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230894710848400 + 159989282823969 = 15195220^2 + 12648687^2 .

It is a cyclic number.

It is not a de Polignac number, because 390883993672369 - 2⁴³ = 382087900650161 is a prime.

It is a super-2 number, since 2×390883993672369² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (390883993672379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195441996836184 + 195441996836185.

It is an arithmetic number, because the mean of its divisors is an integer number (195441996836185).

Almost surely, 2^{390883993672369} is an apocalyptic number.

It is an amenable number.

390883993672369 is a deficient number, since it is larger than the sum of its proper divisors (1).

390883993672369 is an equidigital number, since it uses as much as digits as its factorization.

390883993672369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17142160896, while the sum is 85.

The spelling of 390883993672369 in words is "three hundred ninety trillion, eight hundred eighty-three billion, nine hundred ninety-three million, six hundred seventy-two thousand, three hundred sixty-nine".