172020965 has 8 divisors (see below), whose sum is σ = 217289760. Its totient is φ = 130373712.

The previous prime is 172020949. The next prime is 172020971. The reversal of 172020965 is 569020271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172020965 - 2⁴ = 172020949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905279 + ... + 905468.

It is an arithmetic number, because the mean of its divisors is an integer number (27161220).

Almost surely, 2^172020965 is an apocalyptic number.

It is an amenable number.

172020965 is a deficient number, since it is larger than the sum of its proper divisors (45268795).

172020965 is a wasteful number, since it uses less digits than its factorization.

172020965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810771.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 172020965 is about 13115.6763073812. The cubic root of 172020965 is about 556.1523712007.

The spelling of 172020965 in words is "one hundred seventy-two million, twenty thousand, nine hundred sixty-five".