90649 has 8 divisors (see below), whose sum is σ = 103040.
Its totient is φ = 79056.
The previous prime is 90647. The next prime is 90659. The reversal of 90649 is 94609.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 90649 - 21 = 90647 is a prime.
It is a Duffinian number.
90649 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (90641) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 430.
It is an arithmetic number, because the mean of its divisors is an integer number (12880).
290649 is an apocalyptic number.
It is an amenable number.
90649 is a deficient number, since it is larger than the sum of its proper divisors (12391).
90649 is a wasteful number, since it uses less digits than its factorization.
90649 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 399.
The product of its (nonzero) digits is 1944, while the sum is 28.
The square root of 90649 is about 301.0797236614.
The cubic root of 90649 is about 44.9215092636.
The spelling of 90649 in words is "ninety thousand, six hundred forty-nine".