192799149921 has 135 divisors (see below), whose sum is σ = 339770540499. Its totient is φ = 105339207456.

The previous prime is 192799149913. The next prime is 192799149943. The reversal of 192799149921 is 129941997291.

The square root of 192799149921 is 439089.

It is a perfect power (a square), and thus also a powerful number.

192799149921 is a `hidden beast` number, since 19 + 27 + 9 + 91 + 499 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 101099197521 + 91699952400 = 317961^2 + 302820^2 .

It is not a de Polignac number, because 192799149921 - 2³ = 192799149913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (192799149911) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1871836356 + ... + 1871836458.

Almost surely, 2^192799149921 is an apocalyptic number.

192799149921 is the 439089-th square number.

192799149921 is the 219545-th centered octagonal number.

It is an amenable number.

192799149921 is a deficient number, since it is larger than the sum of its proper divisors (146971390578).

192799149921 is an frugal number, since it uses more digits than its factorization.

192799149921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 142 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 63.

The spelling of 192799149921 in words is "one hundred ninety-two billion, seven hundred ninety-nine million, one hundred forty-nine thousand, nine hundred twenty-one".