91243607 has 32 divisors (see below), whose sum is σ = 119952000. Its totient is φ = 67751424.

The previous prime is 91243597. The next prime is 91243609. The reversal of 91243607 is 70634219.

It is not a de Polignac number, because 91243607 - 2⁶ = 91243543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91243609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261269 + ... + 261617.

It is an arithmetic number, because the mean of its divisors is an integer number (3748500).

Almost surely, 2^91243607 is an apocalyptic number.

91243607 is a deficient number, since it is larger than the sum of its proper divisors (28708393).

91243607 is a wasteful number, since it uses less digits than its factorization.

91243607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 91243607 is about 9552.1519564965. The cubic root of 91243607 is about 450.1951532150.

The spelling of 91243607 in words is "ninety-one million, two hundred forty-three thousand, six hundred seven".