80700857 has 2 divisors, whose sum is σ = 80700858. Its totient is φ = 80700856.

The previous prime is 80700797. The next prime is 80700863. The reversal of 80700857 is 75800708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48846121 + 31854736 = 6989^2 + 5644^2 .

It is a cyclic number.

It is not a de Polignac number, because 80700857 - 2⁶ = 80700793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80700877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40350428 + 40350429.

It is an arithmetic number, because the mean of its divisors is an integer number (40350429).

Almost surely, 2^80700857 is an apocalyptic number.

It is an amenable number.

80700857 is a deficient number, since it is larger than the sum of its proper divisors (1).

80700857 is an equidigital number, since it uses as much as digits as its factorization.

80700857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 80700857 is about 8983.3655719892. The cubic root of 80700857 is about 432.1415734692.

The spelling of 80700857 in words is "eighty million, seven hundred thousand, eight hundred fifty-seven".