91849715 has 4 divisors (see below), whose sum is σ = 110219664. Its totient is φ = 73479768.

The previous prime is 91849673. The next prime is 91849739. The reversal of 91849715 is 51794819.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51794819 = 67 ⋅773057.

It is a cyclic number.

It is not a de Polignac number, because 91849715 - 2¹⁴ = 91833331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9184967 + ... + 9184976.

It is an arithmetic number, because the mean of its divisors is an integer number (27554916).

Almost surely, 2^91849715 is an apocalyptic number.

91849715 is a deficient number, since it is larger than the sum of its proper divisors (18369949).

91849715 is a wasteful number, since it uses less digits than its factorization.

91849715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18369948.

The product of its digits is 90720, while the sum is 44.

The square root of 91849715 is about 9583.8256974968. The cubic root of 91849715 is about 451.1897979094.

The spelling of 91849715 in words is "ninety-one million, eight hundred forty-nine thousand, seven hundred fifteen".