79766149 has 2 divisors, whose sum is σ = 79766150. Its totient is φ = 79766148.

The previous prime is 79766147. The next prime is 79766177. The reversal of 79766149 is 94166797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75377124 + 4389025 = 8682^2 + 2095^2 .

It is an emirp because it is prime and its reverse (94166797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79766149 - 2¹ = 79766147 is a prime.

Together with 79766147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79766147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39883074 + 39883075.

It is an arithmetic number, because the mean of its divisors is an integer number (39883075).

Almost surely, 2^79766149 is an apocalyptic number.

It is an amenable number.

79766149 is a deficient number, since it is larger than the sum of its proper divisors (1).

79766149 is an equidigital number, since it uses as much as digits as its factorization.

79766149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 79766149 is about 8931.1896743939. The cubic root of 79766149 is about 430.4666809947.

The spelling of 79766149 in words is "seventy-nine million, seven hundred sixty-six thousand, one hundred forty-nine".