79090991803 has 8 divisors (see below), whose sum is σ = 79911906480. Its totient is φ = 78274092000.

The previous prime is 79090991789. The next prime is 79090991807. The reversal of 79090991803 is 30819909097.

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 79090991803 - 2²⁹ = 78554120891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79090991807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964108 + ... + 1042921.

It is an arithmetic number, because the mean of its divisors is an integer number (9988988310).

Almost surely, 2^79090991803 is an apocalyptic number.

79090991803 is a deficient number, since it is larger than the sum of its proper divisors (820914677).

79090991803 is a wasteful number, since it uses less digits than its factorization.

79090991803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007437.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 79090991803 in words is "seventy-nine billion, ninety million, nine hundred ninety-one thousand, eight hundred three".