891338079 has 16 divisors (see below), whose sum is σ = 1207204992. Its totient is φ = 584901408.

The previous prime is 891338069. The next prime is 891338083. The reversal of 891338079 is 970833198.

It is not a de Polignac number, because 891338079 - 2²⁰ = 890289503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891338069) 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 15 ways as a sum of consecutive naturals, for example, 62512 + ... + 75434.

It is an arithmetic number, because the mean of its divisors is an integer number (75450312).

Almost surely, 2^891338079 is an apocalyptic number.

891338079 is a deficient number, since it is larger than the sum of its proper divisors (315866913).

891338079 is a wasteful number, since it uses less digits than its factorization.

891338079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13286.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 891338079 is about 29855.2856124339. The cubic root of 891338079 is about 962.3819895569.

The spelling of 891338079 in words is "eight hundred ninety-one million, three hundred thirty-eight thousand, seventy-nine".