7990177493 has 2 divisors, whose sum is σ = 7990177494. Its totient is φ = 7990177492.

The previous prime is 7990177427. The next prime is 7990177543. The reversal of 7990177493 is 3947710997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6009660484 + 1980517009 = 77522^2 + 44503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7990177493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7990177693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995088746 + 3995088747.

It is an arithmetic number, because the mean of its divisors is an integer number (3995088747).

Almost surely, 2^7990177493 is an apocalyptic number.

It is an amenable number.

7990177493 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990177493 is an equidigital number, since it uses as much as digits as its factorization.

7990177493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The square root of 7990177493 is about 89387.7927515833. The cubic root of 7990177493 is about 1999.1811225156.

The spelling of 7990177493 in words is "seven billion, nine hundred ninety million, one hundred seventy-seven thousand, four hundred ninety-three".