79825147 has 2 divisors, whose sum is σ = 79825148. Its totient is φ = 79825146.

The previous prime is 79825133. The next prime is 79825177. The reversal of 79825147 is 74152897.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79825147 is a prime.

It is not a weakly prime, because it can be changed into another prime (79825117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39912573 + 39912574.

It is an arithmetic number, because the mean of its divisors is an integer number (39912574).

Almost surely, 2^79825147 is an apocalyptic number.

79825147 is a deficient number, since it is larger than the sum of its proper divisors (1).

79825147 is an equidigital number, since it uses as much as digits as its factorization.

79825147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 79825147 is about 8934.4919833195. The cubic root of 79825147 is about 430.5727845432.

The spelling of 79825147 in words is "seventy-nine million, eight hundred twenty-five thousand, one hundred forty-seven".