79770709 has 8 divisors (see below), whose sum is σ = 80744832. Its totient is φ = 78800400.

The previous prime is 79770689. The next prime is 79770767. The reversal of 79770709 is 90707797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79770709 - 2¹³ = 79762517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79770799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74512 + ... + 75574.

It is an arithmetic number, because the mean of its divisors is an integer number (10093104).

Almost surely, 2^79770709 is an apocalyptic number.

It is an amenable number.

79770709 is a deficient number, since it is larger than the sum of its proper divisors (974123).

79770709 is a wasteful number, since it uses less digits than its factorization.

79770709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907.

The product of its (nonzero) digits is 194481, while the sum is 46.

The square root of 79770709 is about 8931.4449558848. Note that the first 3 decimals coincide. The cubic root of 79770709 is about 430.4748836834.

It can be divided in two parts, 79770 and 709, that multiplied together give a triangular number (56556930 = T₁₀₆₃₅).

The spelling of 79770709 in words is "seventy-nine million, seven hundred seventy thousand, seven hundred nine".