80857417 has 2 divisors, whose sum is σ = 80857418. Its totient is φ = 80857416.

The previous prime is 80857411. The next prime is 80857451. The reversal of 80857417 is 71475808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 145161 = 8984^2 + 381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80857417 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80857417.

It is not a weakly prime, because it can be changed into another prime (80857411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40428708 + 40428709.

It is an arithmetic number, because the mean of its divisors is an integer number (40428709).

Almost surely, 2^80857417 is an apocalyptic number.

It is an amenable number.

80857417 is a deficient number, since it is larger than the sum of its proper divisors (1).

80857417 is an equidigital number, since it uses as much as digits as its factorization.

80857417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 80857417 is about 8992.0752332262. The cubic root of 80857417 is about 432.4208451041.

The spelling of 80857417 in words is "eighty million, eight hundred fifty-seven thousand, four hundred seventeen".