880172779 has 4 divisors (see below), whose sum is σ = 885572776. Its totient is φ = 874772784.

The previous prime is 880172771. The next prime is 880172791. The reversal of 880172779 is 977271088.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 880172779 - 2³ = 880172771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (880172771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2699754 + ... + 2700079.

It is an arithmetic number, because the mean of its divisors is an integer number (221393194).

Almost surely, 2^880172779 is an apocalyptic number.

880172779 is a deficient number, since it is larger than the sum of its proper divisors (5399997).

880172779 is a wasteful number, since it uses less digits than its factorization.

880172779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5399996.

The product of its (nonzero) digits is 395136, while the sum is 49.

The square root of 880172779 is about 29667.7059949029. The cubic root of 880172779 is about 958.3466837275.

The spelling of 880172779 in words is "eight hundred eighty million, one hundred seventy-two thousand, seven hundred seventy-nine".