398209932251 has 2 divisors, whose sum is σ = 398209932252. Its totient is φ = 398209932250.

The previous prime is 398209932233. The next prime is 398209932287. The reversal of 398209932251 is 152239902893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398209932251 - 2³⁸ = 123332025307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398209932193 and 398209932202.

It is not a weakly prime, because it can be changed into another prime (398209932151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199104966125 + 199104966126.

It is an arithmetic number, because the mean of its divisors is an integer number (199104966126).

Almost surely, 2^398209932251 is an apocalyptic number.

398209932251 is a deficient number, since it is larger than the sum of its proper divisors (1).

398209932251 is an equidigital number, since it uses as much as digits as its factorization.

398209932251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 398209932251 in words is "three hundred ninety-eight billion, two hundred nine million, nine hundred thirty-two thousand, two hundred fifty-one".