79897805 has 8 divisors (see below), whose sum is σ = 103252632. Its totient is φ = 59001408.

The previous prime is 79897799. The next prime is 79897847. The reversal of 79897805 is 50879897.

It can be written as a sum of positive squares in 4 ways, for example, as 4919524 + 74978281 = 2218^2 + 8659^2 .

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 79897805 - 2⁴ = 79897789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614534 + ... + 614663.

It is an arithmetic number, because the mean of its divisors is an integer number (12906579).

Almost surely, 2^79897805 is an apocalyptic number.

It is an amenable number.

79897805 is a deficient number, since it is larger than the sum of its proper divisors (23354827).

79897805 is a wasteful number, since it uses less digits than its factorization.

79897805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229215.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 79897805 is about 8938.5572101990. The cubic root of 79897805 is about 430.7033827798.

The spelling of 79897805 in words is "seventy-nine million, eight hundred ninety-seven thousand, eight hundred five".