807318997 has 2 divisors, whose sum is σ = 807318998. Its totient is φ = 807318996.

The previous prime is 807318973. The next prime is 807319031. The reversal of 807318997 is 799813708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525280561 + 282038436 = 22919^2 + 16794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-807318997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (807318097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403659498 + 403659499.

It is an arithmetic number, because the mean of its divisors is an integer number (403659499).

Almost surely, 2^807318997 is an apocalyptic number.

It is an amenable number.

807318997 is a deficient number, since it is larger than the sum of its proper divisors (1).

807318997 is an equidigital number, since it uses as much as digits as its factorization.

807318997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 807318997 is about 28413.3594810610. The cubic root of 807318997 is about 931.1401582561.

The spelling of 807318997 in words is "eight hundred seven million, three hundred eighteen thousand, nine hundred ninety-seven".