389462590421 has 2 divisors, whose sum is σ = 389462590422. Its totient is φ = 389462590420.

The previous prime is 389462590379. The next prime is 389462590459. The reversal of 389462590421 is 124095264983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209274226225 + 180188364196 = 457465^2 + 424486^2 .

It is a cyclic number.

It is not a de Polignac number, because 389462590421 - 2²⁶ = 389395481557 is a prime.

It is a super-2 number, since 2×389462590421² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389462590481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194731295210 + 194731295211.

It is an arithmetic number, because the mean of its divisors is an integer number (194731295211).

Almost surely, 2^389462590421 is an apocalyptic number.

It is an amenable number.

389462590421 is a deficient number, since it is larger than the sum of its proper divisors (1).

389462590421 is an equidigital number, since it uses as much as digits as its factorization.

389462590421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 389462590421 in words is "three hundred eighty-nine billion, four hundred sixty-two million, five hundred ninety thousand, four hundred twenty-one".