100505992 has 8 divisors (see below), whose sum is σ = 188448750. Its totient is φ = 50252992.

The previous prime is 100505987. The next prime is 100506001. The reversal of 100505992 is 299505001.

It can be written as a sum of positive squares in only one way, i.e., 93818596 + 6687396 = 9686^2 + 2586^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6281617 + ... + 6281632.

Almost surely, 2^100505992 is an apocalyptic number.

It is an amenable number.

100505992 is a deficient number, since it is larger than the sum of its proper divisors (87942758).

100505992 is a wasteful number, since it uses less digits than its factorization.

100505992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12563255 (or 12563251 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 100505992 is about 10025.2676772244. The cubic root of 100505992 is about 464.9404355816.

The spelling of 100505992 in words is "one hundred million, five hundred five thousand, nine hundred ninety-two".