90811685 has 8 divisors (see below), whose sum is σ = 110353920. Its totient is φ = 71729424.

The previous prime is 90811639. The next prime is 90811709. The reversal of 90811685 is 58611809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90811685 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114557 + ... + 115346.

It is an arithmetic number, because the mean of its divisors is an integer number (13794240).

Almost surely, 2^90811685 is an apocalyptic number.

It is an amenable number.

90811685 is a deficient number, since it is larger than the sum of its proper divisors (19542235).

90811685 is a wasteful number, since it uses less digits than its factorization.

90811685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229987.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 90811685 is about 9529.5165144933. The cubic root of 90811685 is about 449.4836629173.

The spelling of 90811685 in words is "ninety million, eight hundred eleven thousand, six hundred eighty-five".