80139263 has 2 divisors, whose sum is σ = 80139264. Its totient is φ = 80139262.

The previous prime is 80139223. The next prime is 80139289. The reversal of 80139263 is 36293108.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80139263 - 2¹⁰ = 80138239 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80139223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40069631 + 40069632.

It is an arithmetic number, because the mean of its divisors is an integer number (40069632).

Almost surely, 2^80139263 is an apocalyptic number.

80139263 is a deficient number, since it is larger than the sum of its proper divisors (1).

80139263 is an equidigital number, since it uses as much as digits as its factorization.

80139263 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 32.

The square root of 80139263 is about 8952.0535632893. The cubic root of 80139263 is about 431.1368205968.

The spelling of 80139263 in words is "eighty million, one hundred thirty-nine thousand, two hundred sixty-three".