91537161 has 8 divisors (see below), whose sum is σ = 122187744. Its totient is φ = 60955680.

The previous prime is 91537151. The next prime is 91537169. The reversal of 91537161 is 16173519.

It is a happy number.

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

It is not a de Polignac number, because 91537161 - 2⁶ = 91537097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91537169) 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, 14100 + ... + 19541.

It is an arithmetic number, because the mean of its divisors is an integer number (15273468).

Almost surely, 2^91537161 is an apocalyptic number.

It is an amenable number.

91537161 is a deficient number, since it is larger than the sum of its proper divisors (30650583).

91537161 is a wasteful number, since it uses less digits than its factorization.

91537161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34551.

The product of its digits is 5670, while the sum is 33.

The square root of 91537161 is about 9567.5054742603. The cubic root of 91537161 is about 450.6774339941.

The spelling of 91537161 in words is "ninety-one million, five hundred thirty-seven thousand, one hundred sixty-one".