398110291 has 2 divisors, whose sum is σ = 398110292. Its totient is φ = 398110290.

The previous prime is 398110157. The next prime is 398110303. The reversal of 398110291 is 192011893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398110291 - 2¹³ = 398102099 is a prime.

It is not a weakly prime, because it can be changed into another prime (398110991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199055145 + 199055146.

It is an arithmetic number, because the mean of its divisors is an integer number (199055146).

Almost surely, 2^398110291 is an apocalyptic number.

398110291 is a deficient number, since it is larger than the sum of its proper divisors (1).

398110291 is an equidigital number, since it uses as much as digits as its factorization.

398110291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 398110291 is about 19952.7013459331. The cubic root of 398110291 is about 735.6441764934.

The spelling of 398110291 in words is "three hundred ninety-eight million, one hundred ten thousand, two hundred ninety-one".