80138929 has 8 divisors (see below), whose sum is σ = 88636520. Its totient is φ = 71974656.

The previous prime is 80138911. The next prime is 80138939. The reversal of 80138929 is 92983108.

It can be written as a sum of positive squares in 4 ways, for example, as 304704 + 79834225 = 552^2 + 8935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80138929 - 2⁵ = 80138897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80138891 and 80138900.

It is not an unprimeable number, because it can be changed into a prime (80138909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82824 + ... + 83785.

It is an arithmetic number, because the mean of its divisors is an integer number (11079565).

Almost surely, 2^80138929 is an apocalyptic number.

It is an amenable number.

80138929 is a deficient number, since it is larger than the sum of its proper divisors (8497591).

80138929 is a wasteful number, since it uses less digits than its factorization.

80138929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166659.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 80138929 is about 8952.0349083323. The cubic root of 80138929 is about 431.1362216399.

The spelling of 80138929 in words is "eighty million, one hundred thirty-eight thousand, nine hundred twenty-nine".