80957839 has 2 divisors, whose sum is σ = 80957840. Its totient is φ = 80957838.

The previous prime is 80957831. The next prime is 80957867. The reversal of 80957839 is 93875908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80957839 - 2³ = 80957831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80957792 and 80957801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80957831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40478919 + 40478920.

It is an arithmetic number, because the mean of its divisors is an integer number (40478920).

Almost surely, 2^80957839 is an apocalyptic number.

80957839 is a deficient number, since it is larger than the sum of its proper divisors (1).

80957839 is an equidigital number, since it uses as much as digits as its factorization.

80957839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 80957839 is about 8997.6574173504. The cubic root of 80957839 is about 432.5997880832.

It can be divided in two parts, 80957 and 839, that added together give a square (81796 = 286²).

The spelling of 80957839 in words is "eighty million, nine hundred fifty-seven thousand, eight hundred thirty-nine".