79148869 has 2 divisors, whose sum is σ = 79148870. Its totient is φ = 79148868.

The previous prime is 79148837. The next prime is 79148897. The reversal of 79148869 is 96884197.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 471969 = 8870^2 + 687^2 .

It is an emirp because it is prime and its reverse (96884197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79148869 - 2⁵ = 79148837 is a prime.

It is a super-2 number, since 2×79148869² = 12529086927958322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79148899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39574434 + 39574435.

It is an arithmetic number, because the mean of its divisors is an integer number (39574435).

Almost surely, 2^79148869 is an apocalyptic number.

It is an amenable number.

79148869 is a deficient number, since it is larger than the sum of its proper divisors (1).

79148869 is an equidigital number, since it uses as much as digits as its factorization.

79148869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 79148869 is about 8896.5650112838. The cubic root of 79148869 is about 429.3533981054.

The spelling of 79148869 in words is "seventy-nine million, one hundred forty-eight thousand, eight hundred sixty-nine".