398051933 has 2 divisors, whose sum is σ = 398051934. Its totient is φ = 398051932.

The previous prime is 398051921. The next prime is 398051947. The reversal of 398051933 is 339150893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250842244 + 147209689 = 15838^2 + 12133^2 .

It is a cyclic number.

It is not a de Polignac number, because 398051933 - 2⁴ = 398051917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398051963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199025966 + 199025967.

It is an arithmetic number, because the mean of its divisors is an integer number (199025967).

Almost surely, 2^398051933 is an apocalyptic number.

It is an amenable number.

398051933 is a deficient number, since it is larger than the sum of its proper divisors (1).

398051933 is an equidigital number, since it uses as much as digits as its factorization.

398051933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 398051933 is about 19951.2388838388. The cubic root of 398051933 is about 735.6082293186.

The spelling of 398051933 in words is "three hundred ninety-eight million, fifty-one thousand, nine hundred thirty-three".