398325311 has 2 divisors, whose sum is σ = 398325312. Its totient is φ = 398325310.

The previous prime is 398325289. The next prime is 398325331. The reversal of 398325311 is 113523893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398325311 - 2²² = 394131007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398325331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199162655 + 199162656.

It is an arithmetic number, because the mean of its divisors is an integer number (199162656).

Almost surely, 2^398325311 is an apocalyptic number.

398325311 is a deficient number, since it is larger than the sum of its proper divisors (1).

398325311 is an equidigital number, since it uses as much as digits as its factorization.

398325311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 398325311 is about 19958.0888614116. The cubic root of 398325311 is about 735.7765935192.

The spelling of 398325311 in words is "three hundred ninety-eight million, three hundred twenty-five thousand, three hundred eleven".