398148131 has 2 divisors, whose sum is σ = 398148132. Its totient is φ = 398148130.

The previous prime is 398148119. The next prime is 398148133. The reversal of 398148131 is 131841893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398148131 - 2⁶ = 398148067 is a prime.

It is a super-2 number, since 2×398148131² = 317043868437586322, which contains 22 as substring.

Together with 398148133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398148133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199074065 + 199074066.

It is an arithmetic number, because the mean of its divisors is an integer number (199074066).

Almost surely, 2^398148131 is an apocalyptic number.

398148131 is a deficient number, since it is larger than the sum of its proper divisors (1).

398148131 is an equidigital number, since it uses as much as digits as its factorization.

398148131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 398148131 is about 19953.6495659315. The cubic root of 398148131 is about 735.6674831787.

The spelling of 398148131 in words is "three hundred ninety-eight million, one hundred forty-eight thousand, one hundred thirty-one".