880631809 has 4 divisors (see below), whose sum is σ = 899368704. Its totient is φ = 861894916.

The previous prime is 880631749. The next prime is 880631837. The reversal of 880631809 is 908136088.

It is a happy number.

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 880631809 - 2⁷ = 880631681 is a prime.

It is a super-2 number, since 2×880631809² = 1551024766045224962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (880631839) 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, 9368377 + ... + 9368470.

It is an arithmetic number, because the mean of its divisors is an integer number (224842176).

Almost surely, 2^880631809 is an apocalyptic number.

It is an amenable number.

880631809 is a deficient number, since it is larger than the sum of its proper divisors (18736895).

880631809 is a wasteful number, since it uses less digits than its factorization.

880631809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18736894.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 880631809 is about 29675.4411761645. The cubic root of 880631809 is about 958.5132545935.

The spelling of 880631809 in words is "eight hundred eighty million, six hundred thirty-one thousand, eight hundred nine".