17163428921 has 2 divisors, whose sum is σ = 17163428922. Its totient is φ = 17163428920.

The previous prime is 17163428899. The next prime is 17163428977. The reversal of 17163428921 is 12982436171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10294334521 + 6869094400 = 101461^2 + 82880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17163428921 is a prime.

It is not a weakly prime, because it can be changed into another prime (17163428981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8581714460 + 8581714461.

It is an arithmetic number, because the mean of its divisors is an integer number (8581714461).

Almost surely, 2^17163428921 is an apocalyptic number.

It is an amenable number.

17163428921 is a deficient number, since it is larger than the sum of its proper divisors (1).

17163428921 is an equidigital number, since it uses as much as digits as its factorization.

17163428921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The spelling of 17163428921 in words is "seventeen billion, one hundred sixty-three million, four hundred twenty-eight thousand, nine hundred twenty-one".