79003993 has 4 divisors (see below), whose sum is σ = 79285428. Its totient is φ = 78722560.

The previous prime is 79003949. The next prime is 79003997. The reversal of 79003993 is 39930097.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39930097 = 2887 ⋅13831.

It can be written as a sum of positive squares in 2 ways, for example, as 27910089 + 51093904 = 5283^2 + 7148^2 .

It is a cyclic number.

It is not a de Polignac number, because 79003993 - 2¹⁷ = 78872921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79003997) 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, 140296 + ... + 140857.

It is an arithmetic number, because the mean of its divisors is an integer number (19821357).

Almost surely, 2^79003993 is an apocalyptic number.

It is an amenable number.

79003993 is a deficient number, since it is larger than the sum of its proper divisors (281435).

79003993 is a wasteful number, since it uses less digits than its factorization.

79003993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281434.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 79003993 is about 8888.4190382767. The cubic root of 79003993 is about 429.0912718322.

The spelling of 79003993 in words is "seventy-nine million, three thousand, nine hundred ninety-three".