7990489679 has 2 divisors, whose sum is σ = 7990489680. Its totient is φ = 7990489678.

The previous prime is 7990489649. The next prime is 7990489733. The reversal of 7990489679 is 9769840997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7990489679 - 2¹² = 7990485583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7990489649) 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, 3995244839 + 3995244840.

It is an arithmetic number, because the mean of its divisors is an integer number (3995244840).

Almost surely, 2^7990489679 is an apocalyptic number.

7990489679 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990489679 is an equidigital number, since it uses as much as digits as its factorization.

7990489679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61725888, while the sum is 68.

The square root of 7990489679 is about 89389.5389796815. The cubic root of 7990489679 is about 1999.2071589931.

The spelling of 7990489679 in words is "seven billion, nine hundred ninety million, four hundred eighty-nine thousand, six hundred seventy-nine".