79140823 has 2 divisors, whose sum is σ = 79140824. Its totient is φ = 79140822.

The previous prime is 79140821. The next prime is 79140827. The reversal of 79140823 is 32804197.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79140823 - 2¹ = 79140821 is a prime.

Together with 79140821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79140821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39570411 + 39570412.

It is an arithmetic number, because the mean of its divisors is an integer number (39570412).

Almost surely, 2^79140823 is an apocalyptic number.

79140823 is a deficient number, since it is larger than the sum of its proper divisors (1).

79140823 is an equidigital number, since it uses as much as digits as its factorization.

79140823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 79140823 is about 8896.1128027920. The cubic root of 79140823 is about 429.3388487524.

It can be divided in two parts, 791 and 40823, that added together give a palindrome (41614).

The spelling of 79140823 in words is "seventy-nine million, one hundred forty thousand, eight hundred twenty-three".