91740619 has 4 divisors (see below), whose sum is σ = 97137144. Its totient is φ = 86344096.

The previous prime is 91740617. The next prime is 91740631. The reversal of 91740619 is 91604719.

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 91740619 - 2¹ = 91740617 is a prime.

It is a super-2 number, since 2×91740619² = 16832682349006322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91740611) 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, 2698237 + ... + 2698270.

It is an arithmetic number, because the mean of its divisors is an integer number (24284286).

Almost surely, 2^91740619 is an apocalyptic number.

91740619 is a deficient number, since it is larger than the sum of its proper divisors (5396525).

91740619 is a wasteful number, since it uses less digits than its factorization.

91740619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396524.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 91740619 is about 9578.1323336024. The cubic root of 91740619 is about 451.0110911181.

The spelling of 91740619 in words is "ninety-one million, seven hundred forty thousand, six hundred nineteen".