161466523 has 2 divisors, whose sum is σ = 161466524. Its totient is φ = 161466522.

The previous prime is 161466517. The next prime is 161466533. The reversal of 161466523 is 325664161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161466523 - 2²⁵ = 127912091 is a prime.

It is not a weakly prime, because it can be changed into another prime (161466533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80733261 + 80733262.

It is an arithmetic number, because the mean of its divisors is an integer number (80733262).

Almost surely, 2^161466523 is an apocalyptic number.

161466523 is a deficient number, since it is larger than the sum of its proper divisors (1).

161466523 is an equidigital number, since it uses as much as digits as its factorization.

161466523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 161466523 is about 12706.9478239269. The cubic root of 161466523 is about 544.5371296492.

The spelling of 161466523 in words is "one hundred sixty-one million, four hundred sixty-six thousand, five hundred twenty-three".