80647577 has 2 divisors, whose sum is σ = 80647578. Its totient is φ = 80647576.

The previous prime is 80647573. The next prime is 80647597. The reversal of 80647577 is 77574608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79049881 + 1597696 = 8891^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 80647577 - 2² = 80647573 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80647573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40323788 + 40323789.

It is an arithmetic number, because the mean of its divisors is an integer number (40323789).

Almost surely, 2^80647577 is an apocalyptic number.

It is an amenable number.

80647577 is a deficient number, since it is larger than the sum of its proper divisors (1).

80647577 is an equidigital number, since it uses as much as digits as its factorization.

80647577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 80647577 is about 8980.3996013541. The cubic root of 80647577 is about 432.0464502665.

The spelling of 80647577 in words is "eighty million, six hundred forty-seven thousand, five hundred seventy-seven".