91442089979 has 8 divisors (see below), whose sum is σ = 91776291840. Its totient is φ = 91108464616.

The previous prime is 91442089967. The next prime is 91442089987. The reversal of 91442089979 is 97998024419.

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 91442089979 - 2¹² = 91442085883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91442089679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174974 + ... + 462060.

It is an arithmetic number, because the mean of its divisors is an integer number (11472036480).

Almost surely, 2^91442089979 is an apocalyptic number.

91442089979 is a deficient number, since it is larger than the sum of its proper divisors (334201861).

91442089979 is a wasteful number, since it uses less digits than its factorization.

91442089979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288249.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 91442089979 in words is "ninety-one billion, four hundred forty-two million, eighty-nine thousand, nine hundred seventy-nine".