807949817 has 2 divisors, whose sum is σ = 807949818. Its totient is φ = 807949816.

The previous prime is 807949771. The next prime is 807949847. The reversal of 807949817 is 718949708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762643456 + 45306361 = 27616^2 + 6731^2 .

It is a cyclic number.

It is not a de Polignac number, because 807949817 - 2⁸ = 807949561 is a prime.

It is not a weakly prime, because it can be changed into another prime (807949847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403974908 + 403974909.

It is an arithmetic number, because the mean of its divisors is an integer number (403974909).

Almost surely, 2^807949817 is an apocalyptic number.

It is an amenable number.

807949817 is a deficient number, since it is larger than the sum of its proper divisors (1).

807949817 is an equidigital number, since it uses as much as digits as its factorization.

807949817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 807949817 is about 28424.4580775078. The cubic root of 807949817 is about 931.3826187599.

The spelling of 807949817 in words is "eight hundred seven million, nine hundred forty-nine thousand, eight hundred seventeen".