8398640597 has 2 divisors, whose sum is σ = 8398640598. Its totient is φ = 8398640596.

The previous prime is 8398640581. The next prime is 8398640609. The reversal of 8398640597 is 7950468938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4760862001 + 3637778596 = 68999^2 + 60314^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398640597 - 2⁴ = 8398640581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8398940597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199320298 + 4199320299.

It is an arithmetic number, because the mean of its divisors is an integer number (4199320299).

Almost surely, 2^8398640597 is an apocalyptic number.

It is an amenable number.

8398640597 is a deficient number, since it is larger than the sum of its proper divisors (1).

8398640597 is an equidigital number, since it uses as much as digits as its factorization.

8398640597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The square root of 8398640597 is about 91644.0974476807. The cubic root of 8398640597 is about 2032.6830495981.

The spelling of 8398640597 in words is "eight billion, three hundred ninety-eight million, six hundred forty thousand, five hundred ninety-seven".