80591869 has 4 divisors (see below), whose sum is σ = 80663040. Its totient is φ = 80520700.

The previous prime is 80591851. The next prime is 80591873. The reversal of 80591869 is 96819508.

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 80591869 - 2⁵ = 80591837 is a prime.

It is a super-2 number, since 2×80591869² = 12990098697826322, 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 (80591669) 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, 33859 + ... + 36160.

It is an arithmetic number, because the mean of its divisors is an integer number (20165760).

Almost surely, 2^80591869 is an apocalyptic number.

It is an amenable number.

80591869 is a deficient number, since it is larger than the sum of its proper divisors (71171).

80591869 is a wasteful number, since it uses less digits than its factorization.

80591869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71170.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 80591869 is about 8977.2974218302. The cubic root of 80591869 is about 431.9469474317.

The spelling of 80591869 in words is "eighty million, five hundred ninety-one thousand, eight hundred sixty-nine".