161923132 has 12 divisors (see below), whose sum is σ = 323846320. Its totient is φ = 69395616.

The previous prime is 161923103. The next prime is 161923133. The reversal of 161923132 is 231329161.

161923132 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 5782969 = 161923132 / (1 + 6 + 1 + 9 + 2 + 3 + 1 + 3 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 161923132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161923133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2891457 + ... + 2891512.

Almost surely, 2^161923132 is an apocalyptic number.

It is an amenable number.

161923132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161923132 is a wasteful number, since it uses less digits than its factorization.

161923132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782980 (or 5782978 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 161923132 is about 12724.9020428450. The cubic root of 161923132 is about 545.0499429584.

The spelling of 161923132 in words is "one hundred sixty-one million, nine hundred twenty-three thousand, one hundred thirty-two".