80813739 has 4 divisors (see below), whose sum is σ = 107751656. Its totient is φ = 53875824.

The previous prime is 80813729. The next prime is 80813741. The reversal of 80813739 is 93731808.

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

It is not a de Polignac number, because 80813739 - 2⁴ = 80813723 is a prime.

It is a super-2 number, since 2×80813739² = 13061720822320242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80813697 and 80813706.

It is not an unprimeable number, because it can be changed into a prime (80813729) 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, 13468954 + ... + 13468959.

It is an arithmetic number, because the mean of its divisors is an integer number (26937914).

Almost surely, 2^80813739 is an apocalyptic number.

80813739 is a deficient number, since it is larger than the sum of its proper divisors (26937917).

80813739 is a wasteful number, since it uses less digits than its factorization.

80813739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26937916.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 80813739 is about 8989.6462110586. The cubic root of 80813739 is about 432.3429685972.

The spelling of 80813739 in words is "eighty million, eight hundred thirteen thousand, seven hundred thirty-nine".