79489994249 has 4 divisors (see below), whose sum is σ = 79491025680. Its totient is φ = 79488962820.

The previous prime is 79489994239. The next prime is 79489994281. The reversal of 79489994249 is 94249998497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94249998497 = 10069 ⋅9360413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79489994249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79489994239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389879 + ... + 557660.

It is an arithmetic number, because the mean of its divisors is an integer number (19872756420).

Almost surely, 2^79489994249 is an apocalyptic number.

It is an amenable number.

79489994249 is a deficient number, since it is larger than the sum of its proper divisors (1031431).

79489994249 is an equidigital number, since it uses as much as digits as its factorization.

79489994249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031430.

The product of its digits is 423263232, while the sum is 74.

The spelling of 79489994249 in words is "seventy-nine billion, four hundred eighty-nine million, nine hundred ninety-four thousand, two hundred forty-nine".