398896523 has 2 divisors, whose sum is σ = 398896524. Its totient is φ = 398896522.

The previous prime is 398896489. The next prime is 398896529. The reversal of 398896523 is 325698893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398896523 is a prime.

It is a super-2 number, since 2×398896523² = 318236872122979058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (398896529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199448261 + 199448262.

It is an arithmetic number, because the mean of its divisors is an integer number (199448262).

Almost surely, 2^398896523 is an apocalyptic number.

398896523 is a deficient number, since it is larger than the sum of its proper divisors (1).

398896523 is an equidigital number, since it uses as much as digits as its factorization.

398896523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The square root of 398896523 is about 19972.3940227505. The cubic root of 398896523 is about 736.1281350583.

The spelling of 398896523 in words is "three hundred ninety-eight million, eight hundred ninety-six thousand, five hundred twenty-three".