79308693091 has 4 divisors (see below), whose sum is σ = 79311310384. Its totient is φ = 79306075800.

The previous prime is 79308693089. The next prime is 79308693133. The reversal of 79308693091 is 19039680397.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79308693091 - 2¹ = 79308693089 is a prime.

It is a super-2 number, since 2×79308693091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79308693011) 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, 1262655 + ... + 1323976.

It is an arithmetic number, because the mean of its divisors is an integer number (19827827596).

Almost surely, 2^79308693091 is an apocalyptic number.

79308693091 is a deficient number, since it is larger than the sum of its proper divisors (2617293).

79308693091 is a wasteful number, since it uses less digits than its factorization.

79308693091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617292.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 79308693091 in words is "seventy-nine billion, three hundred eight million, six hundred ninety-three thousand, ninety-one".