80862731 has 2 divisors, whose sum is σ = 80862732. Its totient is φ = 80862730.

The previous prime is 80862697. The next prime is 80862739. The reversal of 80862731 is 13726808.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80862731 is a prime.

It is a super-2 number, since 2×80862731² = 13077562529556722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 80862691 and 80862700.

It is not a weakly prime, because it can be changed into another prime (80862739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40431365 + 40431366.

It is an arithmetic number, because the mean of its divisors is an integer number (40431366).

Almost surely, 2^80862731 is an apocalyptic number.

80862731 is a deficient number, since it is larger than the sum of its proper divisors (1).

80862731 is an equidigital number, since it uses as much as digits as its factorization.

80862731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 80862731 is about 8992.3707107748. The cubic root of 80862731 is about 432.4303178860.

The spelling of 80862731 in words is "eighty million, eight hundred sixty-two thousand, seven hundred thirty-one".