79227749 has 2 divisors, whose sum is σ = 79227750. Its totient is φ = 79227748.

The previous prime is 79227697. The next prime is 79227751. The reversal of 79227749 is 94772297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 6466849 = 8530^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 79227749 - 2²⁴ = 62450533 is a prime.

It is a Sophie Germain prime.

Together with 79227751, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79227649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39613874 + 39613875.

It is an arithmetic number, because the mean of its divisors is an integer number (39613875).

Almost surely, 2^79227749 is an apocalyptic number.

It is an amenable number.

79227749 is a deficient number, since it is larger than the sum of its proper divisors (1).

79227749 is an equidigital number, since it uses as much as digits as its factorization.

79227749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 47.

The square root of 79227749 is about 8900.9970789794. The cubic root of 79227749 is about 429.4959823769.

The spelling of 79227749 in words is "seventy-nine million, two hundred twenty-seven thousand, seven hundred forty-nine".