79948657 has 4 divisors (see below), whose sum is σ = 80003700. Its totient is φ = 79893616.

The previous prime is 79948643. The next prime is 79948669. The reversal of 79948657 is 75684997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75684997 = 149 ⋅507953.

It can be written as a sum of positive squares in 2 ways, for example, as 28740321 + 51208336 = 5361^2 + 7156^2 .

It is a cyclic number.

It is not a de Polignac number, because 79948657 - 2¹¹ = 79946609 is a prime.

It is a super-2 number, since 2×79948657² = 12783575512207298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79948598 and 79948607.

It is not an unprimeable number, because it can be changed into a prime (79948697) 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, 25282 + ... + 28267.

It is an arithmetic number, because the mean of its divisors is an integer number (20000925).

Almost surely, 2^79948657 is an apocalyptic number.

It is an amenable number.

79948657 is a deficient number, since it is larger than the sum of its proper divisors (55043).

79948657 is a wasteful number, since it uses less digits than its factorization.

79948657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55042.

The product of its digits is 3810240, while the sum is 55.

The square root of 79948657 is about 8941.4012883888. The cubic root of 79948657 is about 430.7947389959.

The spelling of 79948657 in words is "seventy-nine million, nine hundred forty-eight thousand, six hundred fifty-seven".