79845649 has 8 divisors (see below), whose sum is σ = 86154152. Its totient is φ = 73560960.

The previous prime is 79845641. The next prime is 79845653. The reversal of 79845649 is 94654897.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65025 + 79780624 = 255^2 + 8932^2 .

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 79845649 - 2³ = 79845641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79845596 and 79845605.

It is not an unprimeable number, because it can be changed into a prime (79845641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1357 + ... + 12709.

It is an arithmetic number, because the mean of its divisors is an integer number (10769269).

Almost surely, 2^79845649 is an apocalyptic number.

It is an amenable number.

79845649 is a deficient number, since it is larger than the sum of its proper divisors (6308503).

79845649 is a wasteful number, since it uses less digits than its factorization.

79845649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907.

The product of its digits is 2177280, while the sum is 52.

The square root of 79845649 is about 8935.6392608475. The cubic root of 79845649 is about 430.6096436364.

The spelling of 79845649 in words is "seventy-nine million, eight hundred forty-five thousand, six hundred forty-nine".