79280249 has 2 divisors, whose sum is σ = 79280250. Its totient is φ = 79280248.

The previous prime is 79280177. The next prime is 79280251. The reversal of 79280249 is 94208297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78198649 + 1081600 = 8843^2 + 1040^2 .

It is an emirp because it is prime and its reverse (94208297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79280249 is a prime.

Together with 79280251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79280269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39640124 + 39640125.

It is an arithmetic number, because the mean of its divisors is an integer number (39640125).

Almost surely, 2^79280249 is an apocalyptic number.

It is an amenable number.

79280249 is a deficient number, since it is larger than the sum of its proper divisors (1).

79280249 is an equidigital number, since it uses as much as digits as its factorization.

79280249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 79280249 is about 8903.9456983969. The cubic root of 79280249 is about 429.5908294502.

The spelling of 79280249 in words is "seventy-nine million, two hundred eighty thousand, two hundred forty-nine".