398516801 has 2 divisors, whose sum is σ = 398516802. Its totient is φ = 398516800.

The previous prime is 398516777. The next prime is 398516809. The reversal of 398516801 is 108615893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234702400 + 163814401 = 15320^2 + 12799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398516801 is a prime.

It is not a weakly prime, because it can be changed into another prime (398516809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199258400 + 199258401.

It is an arithmetic number, because the mean of its divisors is an integer number (199258401).

Almost surely, 2^398516801 is an apocalyptic number.

It is an amenable number.

398516801 is a deficient number, since it is larger than the sum of its proper divisors (1).

398516801 is an equidigital number, since it uses as much as digits as its factorization.

398516801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 398516801 is about 19962.8855880106. The cubic root of 398516801 is about 735.8944798166.

The spelling of 398516801 in words is "three hundred ninety-eight million, five hundred sixteen thousand, eight hundred one".