91551001 has 8 divisors (see below), whose sum is σ = 97399584. Its totient is φ = 85753920.

The previous prime is 91550957. The next prime is 91551023. The reversal of 91551001 is 10015519.

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 91551001 - 2¹¹ = 91548953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91551041) 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, 9175 + ... + 16348.

It is an arithmetic number, because the mean of its divisors is an integer number (12174948).

Almost surely, 2^91551001 is an apocalyptic number.

It is an amenable number.

91551001 is a deficient number, since it is larger than the sum of its proper divisors (5848583).

91551001 is a wasteful number, since it uses less digits than its factorization.

91551001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25751.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 91551001 is about 9568.2287284533. The cubic root of 91551001 is about 450.7001463049.

The spelling of 91551001 in words is "ninety-one million, five hundred fifty-one thousand, one".