91329261 has 8 divisors (see below), whose sum is σ = 123768864. Its totient is φ = 59887920.

The previous prime is 91329221. The next prime is 91329281. The reversal of 91329261 is 16292319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91329261 - 2⁶ = 91329197 is a prime.

It is a super-2 number, since 2×91329261² = 16682067829612242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91329221) 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, 249351 + ... + 249716.

It is an arithmetic number, because the mean of its divisors is an integer number (15471108).

Almost surely, 2^91329261 is an apocalyptic number.

It is an amenable number.

91329261 is a deficient number, since it is larger than the sum of its proper divisors (32439603).

91329261 is a wasteful number, since it uses less digits than its factorization.

91329261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499131.

The product of its digits is 5832, while the sum is 33.

The square root of 91329261 is about 9556.6343971086. The cubic root of 91329261 is about 450.3359811844.

The spelling of 91329261 in words is "ninety-one million, three hundred twenty-nine thousand, two hundred sixty-one".