79207489 has 2 divisors, whose sum is σ = 79207490. Its totient is φ = 79207488.

The previous prime is 79207459. The next prime is 79207517. The reversal of 79207489 is 98470297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65480464 + 13727025 = 8092^2 + 3705^2 .

It is an emirp because it is prime and its reverse (98470297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79207489 - 2⁹ = 79206977 is a prime.

It is not a weakly prime, because it can be changed into another prime (79207459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39603744 + 39603745.

It is an arithmetic number, because the mean of its divisors is an integer number (39603745).

Almost surely, 2^79207489 is an apocalyptic number.

It is an amenable number.

79207489 is a deficient number, since it is larger than the sum of its proper divisors (1).

79207489 is an equidigital number, since it uses as much as digits as its factorization.

79207489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 79207489 is about 8899.8589314663. The cubic root of 79207489 is about 429.4593692351.

The spelling of 79207489 in words is "seventy-nine million, two hundred seven thousand, four hundred eighty-nine".