7998354659 has 2 divisors, whose sum is σ = 7998354660. Its totient is φ = 7998354658.

The previous prime is 7998354653. The next prime is 7998354821. The reversal of 7998354659 is 9564538997.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7998354659 is a prime.

It is a super-2 number, since 2×7998354659² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 7998354595 and 7998354604.

It is not a weakly prime, because it can be changed into another prime (7998354653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999177329 + 3999177330.

It is an arithmetic number, because the mean of its divisors is an integer number (3999177330).

Almost surely, 2^7998354659 is an apocalyptic number.

7998354659 is a deficient number, since it is larger than the sum of its proper divisors (1).

7998354659 is an equidigital number, since it uses as much as digits as its factorization.

7998354659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73483200, while the sum is 65.

The square root of 7998354659 is about 89433.5208912184. The cubic root of 7998354659 is about 1999.8628788491.

The spelling of 7998354659 in words is "seven billion, nine hundred ninety-eight million, three hundred fifty-four thousand, six hundred fifty-nine".