80039929 has 2 divisors, whose sum is σ = 80039930. Its totient is φ = 80039928.

The previous prime is 80039909. The next prime is 80039957. The reversal of 80039929 is 92993008.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72641529 + 7398400 = 8523^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 80039929 - 2⁷ = 80039801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80039891 and 80039900.

It is not a weakly prime, because it can be changed into another prime (80039909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40019964 + 40019965.

It is an arithmetic number, because the mean of its divisors is an integer number (40019965).

Almost surely, 2^80039929 is an apocalyptic number.

It is an amenable number.

80039929 is a deficient number, since it is larger than the sum of its proper divisors (1).

80039929 is an equidigital number, since it uses as much as digits as its factorization.

80039929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 80039929 is about 8946.5037305084. The cubic root of 80039929 is about 430.9586131020.

The spelling of 80039929 in words is "eighty million, thirty-nine thousand, nine hundred twenty-nine".