90621694 has 16 divisors (see below), whose sum is σ = 141142320. Its totient is φ = 43585920.

The previous prime is 90621691. The next prime is 90621701. The reversal of 90621694 is 49612609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90621691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13654 + ... + 19174.

It is an arithmetic number, because the mean of its divisors is an integer number (8821395).

Almost surely, 2^90621694 is an apocalyptic number.

90621694 is a deficient number, since it is larger than the sum of its proper divisors (50520626).

90621694 is a wasteful number, since it uses less digits than its factorization.

90621694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 90621694 is about 9519.5427411194. The cubic root of 90621694 is about 449.1699827459.

The spelling of 90621694 in words is "ninety million, six hundred twenty-one thousand, six hundred ninety-four".