90685641 has 8 divisors (see below), whose sum is σ = 120989344. Its totient is φ = 60419520.

The previous prime is 90685583. The next prime is 90685657. The reversal of 90685641 is 14658609.

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

It is a de Polignac number, because none of the positive numbers 2^k-90685641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90685641.

It is not an unprimeable number, because it can be changed into a prime (90685691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3175 + ... + 13836.

It is an arithmetic number, because the mean of its divisors is an integer number (15123668).

Almost surely, 2^90685641 is an apocalyptic number.

It is an amenable number.

90685641 is a deficient number, since it is larger than the sum of its proper divisors (30303703).

90685641 is a wasteful number, since it uses less digits than its factorization.

90685641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18791.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 90685641 is about 9522.9008710581. The cubic root of 90685641 is about 449.2756098430.

The spelling of 90685641 in words is "ninety million, six hundred eighty-five thousand, six hundred forty-one".