91856349 has 40 divisors (see below), whose sum is σ = 149695392. Its totient is φ = 55792800.

The previous prime is 91856339. The next prime is 91856353. The reversal of 91856349 is 94365819.

It is a happy number.

91856349 is a `hidden beast` number, since 9 + 1 + 8 + 5 + 634 + 9 = 666.

It is not a de Polignac number, because 91856349 - 2¹² = 91852253 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91856309) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 86874 + ... + 87924.

Almost surely, 2^91856349 is an apocalyptic number.

It is an amenable number.

91856349 is a deficient number, since it is larger than the sum of its proper divisors (57839043).

91856349 is a wasteful number, since it uses less digits than its factorization.

91856349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159 (or 1150 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 91856349 is about 9584.1717952048. The cubic root of 91856349 is about 451.2006602950.

The spelling of 91856349 in words is "ninety-one million, eight hundred fifty-six thousand, three hundred forty-nine".