161874539 has 2 divisors, whose sum is σ = 161874540. Its totient is φ = 161874538.

The previous prime is 161874511. The next prime is 161874551. The reversal of 161874539 is 935478161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161874539 - 2⁸ = 161874283 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161874539.

It is not a weakly prime, because it can be changed into another prime (161874569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80937269 + 80937270.

It is an arithmetic number, because the mean of its divisors is an integer number (80937270).

Almost surely, 2^161874539 is an apocalyptic number.

161874539 is a deficient number, since it is larger than the sum of its proper divisors (1).

161874539 is an equidigital number, since it uses as much as digits as its factorization.

161874539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 161874539 is about 12722.9925332054. The cubic root of 161874539 is about 544.9954144888.

The spelling of 161874539 in words is "one hundred sixty-one million, eight hundred seventy-four thousand, five hundred thirty-nine".