163246921 has 2 divisors, whose sum is σ = 163246922. Its totient is φ = 163246920.

The previous prime is 163246913. The next prime is 163246931. The reversal of 163246921 is 129642361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104264521 + 58982400 = 10211^2 + 7680^2 .

It is a cyclic number.

It is not a de Polignac number, because 163246921 - 2³ = 163246913 is a prime.

It is not a weakly prime, because it can be changed into another prime (163246931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81623460 + 81623461.

It is an arithmetic number, because the mean of its divisors is an integer number (81623461).

Almost surely, 2^163246921 is an apocalyptic number.

It is an amenable number.

163246921 is a deficient number, since it is larger than the sum of its proper divisors (1).

163246921 is an equidigital number, since it uses as much as digits as its factorization.

163246921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 163246921 is about 12776.8118480316. The cubic root of 163246921 is about 546.5312502098.

The spelling of 163246921 in words is "one hundred sixty-three million, two hundred forty-six thousand, nine hundred twenty-one".