90643085 has 8 divisors (see below), whose sum is σ = 117138840. Its totient is φ = 66936384.

The previous prime is 90643079. The next prime is 90643109. The reversal of 90643085 is 58034609.

It can be written as a sum of positive squares in 4 ways, for example, as 2621161 + 88021924 = 1619^2 + 9382^2 .

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 90643085 - 2¹⁰ = 90642061 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, 697190 + ... + 697319.

It is an arithmetic number, because the mean of its divisors is an integer number (14642355).

Almost surely, 2^90643085 is an apocalyptic number.

It is an amenable number.

90643085 is a deficient number, since it is larger than the sum of its proper divisors (26495755).

90643085 is a wasteful number, since it uses less digits than its factorization.

90643085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394527.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 90643085 is about 9520.6662056812. Note that the first 3 decimals coincide. The cubic root of 90643085 is about 449.2053217425.

The spelling of 90643085 in words is "ninety million, six hundred forty-three thousand, eighty-five".