79188947 has 2 divisors, whose sum is σ = 79188948. Its totient is φ = 79188946.

The previous prime is 79188913. The next prime is 79188953. The reversal of 79188947 is 74988197.

It is a strong prime.

It is an emirp because it is prime and its reverse (74988197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79188947 - 2⁶ = 79188883 is a prime.

It is not a weakly prime, because it can be changed into another prime (79188247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39594473 + 39594474.

It is an arithmetic number, because the mean of its divisors is an integer number (39594474).

Almost surely, 2^79188947 is an apocalyptic number.

79188947 is a deficient number, since it is larger than the sum of its proper divisors (1).

79188947 is an equidigital number, since it uses as much as digits as its factorization.

79188947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 53.

The square root of 79188947 is about 8898.8171685904. The cubic root of 79188947 is about 429.4258553289.

The spelling of 79188947 in words is "seventy-nine million, one hundred eighty-eight thousand, nine hundred forty-seven".