172996769 has 4 divisors (see below), whose sum is σ = 188723760. Its totient is φ = 157269780.

The previous prime is 172996763. The next prime is 172996781. The reversal of 172996769 is 967699271.

172996769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172996769 - 2²⁰ = 171948193 is a prime.

It is a super-2 number, since 2×172996769² = 59855764168878722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172996763) 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, 7863479 + ... + 7863500.

It is an arithmetic number, because the mean of its divisors is an integer number (47180940).

Almost surely, 2^172996769 is an apocalyptic number.

It is an amenable number.

172996769 is a deficient number, since it is larger than the sum of its proper divisors (15726991).

172996769 is a wasteful number, since it uses less digits than its factorization.

172996769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15726990.

The product of its digits is 2571912, while the sum is 56.

The square root of 172996769 is about 13152.8236132018. The cubic root of 172996769 is about 557.2019966871.

The spelling of 172996769 in words is "one hundred seventy-two million, nine hundred ninety-six thousand, seven hundred sixty-nine".