80139149 has 2 divisors, whose sum is σ = 80139150. Its totient is φ = 80139148.

The previous prime is 80139121. The next prime is 80139179. The reversal of 80139149 is 94193108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73222249 + 6916900 = 8557^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80139149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80139179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40069574 + 40069575.

It is an arithmetic number, because the mean of its divisors is an integer number (40069575).

Almost surely, 2^80139149 is an apocalyptic number.

It is an amenable number.

80139149 is a deficient number, since it is larger than the sum of its proper divisors (1).

80139149 is an equidigital number, since it uses as much as digits as its factorization.

80139149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 80139149 is about 8952.0471960329. The cubic root of 80139149 is about 431.1366161626.

The spelling of 80139149 in words is "eighty million, one hundred thirty-nine thousand, one hundred forty-nine".