79223353849 has 4 divisors (see below), whose sum is σ = 79224089764. Its totient is φ = 79222617936.

The previous prime is 79223353841. The next prime is 79223353861. The reversal of 79223353849 is 94835332297.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10700868025 + 68522485824 = 103445^2 + 261768^2 .

It is a cyclic number.

It is not a de Polignac number, because 79223353849 - 2³ = 79223353841 is a prime.

It is a super-2 number, since 2×79223353849² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79223353849.

It is not an unprimeable number, because it can be changed into a prime (79223353841) 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, 171522 + ... + 433435.

It is an arithmetic number, because the mean of its divisors is an integer number (19806022441).

Almost surely, 2^79223353849 is an apocalyptic number.

It is an amenable number.

79223353849 is a deficient number, since it is larger than the sum of its proper divisors (735915).

79223353849 is a wasteful number, since it uses less digits than its factorization.

79223353849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735914.

The product of its digits is 9797760, while the sum is 55.

The spelling of 79223353849 in words is "seventy-nine billion, two hundred twenty-three million, three hundred fifty-three thousand, eight hundred forty-nine".