79440973 has 4 divisors (see below), whose sum is σ = 80183520. Its totient is φ = 78698428.

The previous prime is 79440967. The next prime is 79440979. The reversal of 79440973 is 37904497.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (79440967) and next prime (79440979).

It is a cyclic number.

It is not a de Polignac number, because 79440973 - 2⁹ = 79440461 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 (79440979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371113 + ... + 371326.

It is an arithmetic number, because the mean of its divisors is an integer number (20045880).

Almost surely, 2^79440973 is an apocalyptic number.

It is an amenable number.

79440973 is a deficient number, since it is larger than the sum of its proper divisors (742547).

79440973 is a wasteful number, since it uses less digits than its factorization.

79440973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742546.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 79440973 is about 8912.9665656279. The cubic root of 79440973 is about 429.8809351254.

The spelling of 79440973 in words is "seventy-nine million, four hundred forty thousand, nine hundred seventy-three".