163908401 has 2 divisors, whose sum is σ = 163908402. Its totient is φ = 163908400.

The previous prime is 163908361. The next prime is 163908413. The reversal of 163908401 is 104809361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136072225 + 27836176 = 11665^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 163908401 - 2²⁶ = 96799537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163908461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81954200 + 81954201.

It is an arithmetic number, because the mean of its divisors is an integer number (81954201).

Almost surely, 2^163908401 is an apocalyptic number.

It is an amenable number.

163908401 is a deficient number, since it is larger than the sum of its proper divisors (1).

163908401 is an equidigital number, since it uses as much as digits as its factorization.

163908401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 163908401 is about 12802.6716352486. The cubic root of 163908401 is about 547.2684408217.

The spelling of 163908401 in words is "one hundred sixty-three million, nine hundred eight thousand, four hundred one".