80138739 has 12 divisors (see below), whose sum is σ = 111701576. Its totient is φ = 51101952.

The previous prime is 80138717. The next prime is 80138749. The reversal of 80138739 is 93783108.

It is not a de Polignac number, because 80138739 - 2²³ = 71750131 is a prime.

It is a super-3 number, since 3×80138739³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80138697 and 80138706.

It is not an unprimeable number, because it can be changed into a prime (80138749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23662 + ... + 26835.

Almost surely, 2^80138739 is an apocalyptic number.

80138739 is a deficient number, since it is larger than the sum of its proper divisors (31562837).

80138739 is a wasteful number, since it uses less digits than its factorization.

80138739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50546 (or 50523 counting only the distinct ones).

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

The square root of 80138739 is about 8952.0242962137. The cubic root of 80138739 is about 431.1358809151.

The spelling of 80138739 in words is "eighty million, one hundred thirty-eight thousand, seven hundred thirty-nine".