398520025913 has 2 divisors, whose sum is σ = 398520025914. Its totient is φ = 398520025912.

The previous prime is 398520025879. The next prime is 398520025991. The reversal of 398520025913 is 319520025893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359871611449 + 38648414464 = 599893^2 + 196592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398520025913 is a prime.

It is a super-2 number, since 2×398520025913² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (398520025213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199260012956 + 199260012957.

It is an arithmetic number, because the mean of its divisors is an integer number (199260012957).

Almost surely, 2^398520025913 is an apocalyptic number.

It is an amenable number.

398520025913 is a deficient number, since it is larger than the sum of its proper divisors (1).

398520025913 is an equidigital number, since it uses as much as digits as its factorization.

398520025913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 398520025913 in words is "three hundred ninety-eight billion, five hundred twenty million, twenty-five thousand, nine hundred thirteen".