90850649 has 4 divisors (see below), whose sum is σ = 93983460. Its totient is φ = 87717840.

The previous prime is 90850637. The next prime is 90850673. The reversal of 90850649 is 94605809.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63361600 + 27489049 = 7960^2 + 5243^2 .

It is a cyclic number.

It is not a de Polignac number, because 90850649 - 2²⁰ = 89802073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90850679) 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 3 ways as a sum of consecutive naturals, for example, 1566362 + ... + 1566419.

It is an arithmetic number, because the mean of its divisors is an integer number (23495865).

Almost surely, 2^90850649 is an apocalyptic number.

It is an amenable number.

90850649 is a deficient number, since it is larger than the sum of its proper divisors (3132811).

90850649 is a wasteful number, since it uses less digits than its factorization.

90850649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132810.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 90850649 is about 9531.5606801824. The cubic root of 90850649 is about 449.5479394371.

The spelling of 90850649 in words is "ninety million, eight hundred fifty thousand, six hundred forty-nine".