91235745 has 12 divisors (see below), whose sum is σ = 158142036. Its totient is φ = 48659040.

The previous prime is 91235743. The next prime is 91235773. The reversal of 91235745 is 54753219.

It can be written as a sum of positive squares in 2 ways, for example, as 60233121 + 31002624 = 7761^2 + 5568^2 .

It is not a de Polignac number, because 91235745 - 2¹ = 91235743 is a prime.

It is a super-2 number, since 2×91235745² = 16647922331410050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91235741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1013686 + ... + 1013775.

It is an arithmetic number, because the mean of its divisors is an integer number (13178503).

Almost surely, 2^91235745 is an apocalyptic number.

It is an amenable number.

91235745 is a deficient number, since it is larger than the sum of its proper divisors (66906291).

91235745 is a wasteful number, since it uses less digits than its factorization.

91235745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027472 (or 2027469 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 91235745 is about 9551.7404173271. The cubic root of 91235745 is about 450.1822224974.

The spelling of 91235745 in words is "ninety-one million, two hundred thirty-five thousand, seven hundred forty-five".