785994857 has 2 divisors, whose sum is σ = 785994858. Its totient is φ = 785994856.

The previous prime is 785994851. The next prime is 785994883. The reversal of 785994857 is 758499587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493550656 + 292444201 = 22216^2 + 17101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-785994857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 785994857.

It is not a weakly prime, because it can be changed into another prime (785994851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392997428 + 392997429.

It is an arithmetic number, because the mean of its divisors is an integer number (392997429).

Almost surely, 2^785994857 is an apocalyptic number.

It is an amenable number.

785994857 is a deficient number, since it is larger than the sum of its proper divisors (1).

785994857 is an equidigital number, since it uses as much as digits as its factorization.

785994857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 62.

The square root of 785994857 is about 28035.5998152349. The cubic root of 785994857 is about 922.8686675541.

The spelling of 785994857 in words is "seven hundred eighty-five million, nine hundred ninety-four thousand, eight hundred fifty-seven".