161924539 has 8 divisors (see below), whose sum is σ = 189570528. Its totient is φ = 135407040.

The previous prime is 161924533. The next prime is 161924557. The reversal of 161924539 is 935429161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161924539 - 2⁹ = 161924027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161924533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281812 + ... + 282385.

It is an arithmetic number, because the mean of its divisors is an integer number (23696316).

Almost surely, 2^161924539 is an apocalyptic number.

161924539 is a deficient number, since it is larger than the sum of its proper divisors (27645989).

161924539 is an equidigital number, since it uses as much as digits as its factorization.

161924539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564245.

The product of its digits is 58320, while the sum is 40.

The square root of 161924539 is about 12724.9573280228. The cubic root of 161924539 is about 545.0515216562.

The spelling of 161924539 in words is "one hundred sixty-one million, nine hundred twenty-four thousand, five hundred thirty-nine".