91160999 has 8 divisors (see below), whose sum is σ = 93511152. Its totient is φ = 88816960.

The previous prime is 91160969. The next prime is 91161019. The reversal of 91160999 is 99906119.

It is a happy number.

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 91160999 - 2¹² = 91156903 is a prime.

It is a super-3 number, since 3×91160999³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91160929) 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, 51737 + ... + 53469.

It is an arithmetic number, because the mean of its divisors is an integer number (11688894).

Almost surely, 2^91160999 is an apocalyptic number.

91160999 is a deficient number, since it is larger than the sum of its proper divisors (2350153).

91160999 is a wasteful number, since it uses less digits than its factorization.

91160999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 91160999 is about 9547.8269255365. The cubic root of 91160999 is about 450.0592498116.

The spelling of 91160999 in words is "ninety-one million, one hundred sixty thousand, nine hundred ninety-nine".