7990564357 has 2 divisors, whose sum is σ = 7990564358. Its totient is φ = 7990564356.

The previous prime is 7990564331. The next prime is 7990564381. The reversal of 7990564357 is 7534650997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4886848836 + 3103715521 = 69906^2 + 55711^2 .

It is an emirp because it is prime and its reverse (7534650997) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7990564357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7990564298 and 7990564307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7990564327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995282178 + 3995282179.

It is an arithmetic number, because the mean of its divisors is an integer number (3995282179).

Almost surely, 2^7990564357 is an apocalyptic number.

It is an amenable number.

7990564357 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990564357 is an equidigital number, since it uses as much as digits as its factorization.

7990564357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7144200, while the sum is 55.

The square root of 7990564357 is about 89389.9566897758. The cubic root of 7990564357 is about 1999.2133870773.

The spelling of 7990564357 in words is "seven billion, nine hundred ninety million, five hundred sixty-four thousand, three hundred fifty-seven".