79138727 has 2 divisors, whose sum is σ = 79138728. Its totient is φ = 79138726.

The previous prime is 79138649. The next prime is 79138729. The reversal of 79138727 is 72783197.

It is a strong prime.

It is an emirp because it is prime and its reverse (72783197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79138727 - 2¹² = 79134631 is a prime.

It is a super-2 number, since 2×79138727² = 12525876222361058, which contains 22 as substring.

Together with 79138729, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79138729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39569363 + 39569364.

It is an arithmetic number, because the mean of its divisors is an integer number (39569364).

Almost surely, 2^79138727 is an apocalyptic number.

79138727 is a deficient number, since it is larger than the sum of its proper divisors (1).

79138727 is an equidigital number, since it uses as much as digits as its factorization.

79138727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 44.

The square root of 79138727 is about 8895.9949977504. The cubic root of 79138727 is about 429.3350584533.

The spelling of 79138727 in words is "seventy-nine million, one hundred thirty-eight thousand, seven hundred twenty-seven".