79769761 has 4 divisors (see below), whose sum is σ = 81077524. Its totient is φ = 78462000.

The previous prime is 79769759. The next prime is 79769783. The reversal of 79769761 is 16796797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13184161 + 66585600 = 3631^2 + 8160^2 .

It is a cyclic number.

It is not a de Polignac number, because 79769761 - 2¹ = 79769759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79769699 and 79769708.

It is not an unprimeable number, because it can be changed into a prime (79769791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653790 + ... + 653911.

It is an arithmetic number, because the mean of its divisors is an integer number (20269381).

Almost surely, 2^79769761 is an apocalyptic number.

It is an amenable number.

79769761 is a deficient number, since it is larger than the sum of its proper divisors (1307763).

79769761 is a wasteful number, since it uses less digits than its factorization.

79769761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307762.

The product of its digits is 1000188, while the sum is 52.

The square root of 79769761 is about 8931.3918848072. The cubic root of 79769761 is about 430.4731784133.

The spelling of 79769761 in words is "seventy-nine million, seven hundred sixty-nine thousand, seven hundred sixty-one".