79637749 has 2 divisors, whose sum is σ = 79637750. Its totient is φ = 79637748.

The previous prime is 79637743. The next prime is 79637827. The reversal of 79637749 is 94773697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79299025 + 338724 = 8905^2 + 582^2 .

It is a cyclic number.

It is not a de Polignac number, because 79637749 - 2⁵ = 79637717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79637696 and 79637705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79637743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39818874 + 39818875.

It is an arithmetic number, because the mean of its divisors is an integer number (39818875).

Almost surely, 2^79637749 is an apocalyptic number.

It is an amenable number.

79637749 is a deficient number, since it is larger than the sum of its proper divisors (1).

79637749 is an equidigital number, since it uses as much as digits as its factorization.

79637749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376, while the sum is 52.

The square root of 79637749 is about 8923.9984872253. The cubic root of 79637749 is about 430.2355821044.

The spelling of 79637749 in words is "seventy-nine million, six hundred thirty-seven thousand, seven hundred forty-nine".