91349557 has 8 divisors (see below), whose sum is σ = 98873600. Its totient is φ = 83896560.

The previous prime is 91349477. The next prime is 91349563. The reversal of 91349557 is 75594319.

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 91349557 - 2⁷ = 91349429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91349057) 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, 15069 + ... + 20242.

It is an arithmetic number, because the mean of its divisors is an integer number (12359200).

Almost surely, 2^91349557 is an apocalyptic number.

It is an amenable number.

91349557 is a deficient number, since it is larger than the sum of its proper divisors (7524043).

91349557 is a wasteful number, since it uses less digits than its factorization.

91349557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35523.

The product of its digits is 170100, while the sum is 43.

The square root of 91349557 is about 9557.6962182317. The cubic root of 91349557 is about 450.3693379349.

The spelling of 91349557 in words is "ninety-one million, three hundred forty-nine thousand, five hundred fifty-seven".