90820687 has 8 divisors (see below), whose sum is σ = 94209104. Its totient is φ = 87490368.

The previous prime is 90820679. The next prime is 90820727. The reversal of 90820687 is 78602809.

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 90820687 - 2³ = 90820679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90820087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11328 + ... + 17605.

It is an arithmetic number, because the mean of its divisors is an integer number (11776138).

Almost surely, 2^90820687 is an apocalyptic number.

90820687 is a deficient number, since it is larger than the sum of its proper divisors (3388417).

90820687 is a wasteful number, since it uses less digits than its factorization.

90820687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29049.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 90820687 is about 9529.9888247574. The cubic root of 90820687 is about 449.4985145973.

The spelling of 90820687 in words is "ninety million, eight hundred twenty thousand, six hundred eighty-seven".