91240965 has 16 divisors (see below), whose sum is σ = 162206400. Its totient is φ = 48661776.

The previous prime is 91240939. The next prime is 91240973. The reversal of 91240965 is 56904219.

It is not a de Polignac number, because 91240965 - 2⁷ = 91240837 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 337795 + ... + 338064.

It is an arithmetic number, because the mean of its divisors is an integer number (10137900).

Almost surely, 2^91240965 is an apocalyptic number.

It is an amenable number.

91240965 is a deficient number, since it is larger than the sum of its proper divisors (70965435).

91240965 is a wasteful number, since it uses less digits than its factorization.

91240965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675873 (or 675867 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 91240965 is about 9552.0136620505. The cubic root of 91240965 is about 450.1908079715.

The spelling of 91240965 in words is "ninety-one million, two hundred forty thousand, nine hundred sixty-five".