1992172799 has 4 divisors (see below), whose sum is σ = 1992339336. Its totient is φ = 1992006264.

The previous prime is 1992172771. The next prime is 1992172801. The reversal of 1992172799 is 9972712991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9972712991 = 23 ⋅433596217.

It is a cyclic number.

It is not a de Polignac number, because 1992172799 - 2¹⁶ = 1992107263 is a prime.

It is a super-2 number, since 2×1992172799² = 7937504922150988802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992171799) 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, 63809 + ... + 89754.

It is an arithmetic number, because the mean of its divisors is an integer number (498084834).

Almost surely, 2^1992172799 is an apocalyptic number.

1992172799 is a deficient number, since it is larger than the sum of its proper divisors (166537).

1992172799 is a wasteful number, since it uses less digits than its factorization.

1992172799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166536.

The product of its digits is 1285956, while the sum is 56.

The square root of 1992172799 is about 44633.7629939489. The cubic root of 1992172799 is about 1258.2752918606.

The spelling of 1992172799 in words is "one billion, nine hundred ninety-two million, one hundred seventy-two thousand, seven hundred ninety-nine".