91351 has 4 divisors (see below), whose sum is σ = 98392. Its totient is φ = 84312.

The previous prime is 91331. The next prime is 91367. The reversal of 91351 is 15319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91351 - 2¹¹ = 89303 is a prime.

It is a Duffinian number.

91351 is a modest number, since divided by 351 gives 91 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3501 + ... + 3526.

It is an arithmetic number, because the mean of its divisors is an integer number (24598).

2⁹¹³⁵¹ is an apocalyptic number.

91351 is the 175-th hex number.

91351 is a deficient number, since it is larger than the sum of its proper divisors (7041).

91351 is a wasteful number, since it uses less digits than its factorization.

91351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7040.

The product of its digits is 135, while the sum is 19.

The square root of 91351 is about 302.2432794952. The cubic root of 91351 is about 45.0371709337.

The spelling of 91351 in words is "ninety-one thousand, three hundred fifty-one".