79321147 has 2 divisors, whose sum is σ = 79321148. Its totient is φ = 79321146.

The previous prime is 79321127. The next prime is 79321163. The reversal of 79321147 is 74112397.

It is a strong prime.

It is an emirp because it is prime and its reverse (74112397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79321147 - 2¹⁵ = 79288379 is a prime.

It is a super-2 number, since 2×79321147² = 12583688722791218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79321127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39660573 + 39660574.

It is an arithmetic number, because the mean of its divisors is an integer number (39660574).

Almost surely, 2^79321147 is an apocalyptic number.

79321147 is a deficient number, since it is larger than the sum of its proper divisors (1).

79321147 is an equidigital number, since it uses as much as digits as its factorization.

79321147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 79321147 is about 8906.2420245578. The cubic root of 79321147 is about 429.6646872129.

The spelling of 79321147 in words is "seventy-nine million, three hundred twenty-one thousand, one hundred forty-seven".