91083685 has 32 divisors (see below), whose sum is σ = 136857600. Its totient is φ = 56535360.

The previous prime is 91083659. The next prime is 91083709. The reversal of 91083685 is 58638019.

It is a happy number.

It is not a de Polignac number, because 91083685 - 2⁹ = 91083173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137886 + ... + 138544.

It is an arithmetic number, because the mean of its divisors is an integer number (4276800).

Almost surely, 2^91083685 is an apocalyptic number.

It is an amenable number.

91083685 is a deficient number, since it is larger than the sum of its proper divisors (45773915).

91083685 is a wasteful number, since it uses less digits than its factorization.

91083685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 91083685 is about 9543.7772920369. Note that the first 3 decimals coincide. The cubic root of 91083685 is about 449.9319814889.

The spelling of 91083685 in words is "ninety-one million, eighty-three thousand, six hundred eighty-five".