398919085291 has 2 divisors, whose sum is σ = 398919085292. Its totient is φ = 398919085290.

The previous prime is 398919085177. The next prime is 398919085309. The reversal of 398919085291 is 192580919893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398919085291 - 2²⁹ = 398382214379 is a prime.

It is not a weakly prime, because it can be changed into another prime (398919085891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199459542645 + 199459542646.

It is an arithmetic number, because the mean of its divisors is an integer number (199459542646).

Almost surely, 2^398919085291 is an apocalyptic number.

398919085291 is a deficient number, since it is larger than the sum of its proper divisors (1).

398919085291 is an equidigital number, since it uses as much as digits as its factorization.

398919085291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 64.

The spelling of 398919085291 in words is "three hundred ninety-eight billion, nine hundred nineteen million, eighty-five thousand, two hundred ninety-one".