161924013 has 6 divisors (see below), whose sum is σ = 233890254. Its totient is φ = 107949336.

The previous prime is 161924011. The next prime is 161924027. The reversal of 161924013 is 310429161.

161924013 is a `hidden beast` number, since 1 + 619 + 2 + 40 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 161874729 + 49284 = 12723^2 + 222^2 .

It is not a de Polignac number, because 161924013 - 2¹ = 161924011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161924011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8995770 + ... + 8995787.

It is an arithmetic number, because the mean of its divisors is an integer number (38981709).

Almost surely, 2^161924013 is an apocalyptic number.

It is an amenable number.

161924013 is a deficient number, since it is larger than the sum of its proper divisors (71966241).

161924013 is a wasteful number, since it uses less digits than its factorization.

161924013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17991563 (or 17991560 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 161924013 is about 12724.9366599602. The cubic root of 161924013 is about 545.0509314689.

The spelling of 161924013 in words is "one hundred sixty-one million, nine hundred twenty-four thousand, thirteen".