90016623 has 32 divisors (see below), whose sum is σ = 141177600. Its totient is φ = 56528928.

The previous prime is 90016603. The next prime is 90016627. The reversal of 90016623 is 32661009.

It is a happy number.

It is not a de Polignac number, because 90016623 - 2⁶ = 90016559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90016627) 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 31 ways as a sum of consecutive naturals, for example, 116065 + ... + 116837.

It is an arithmetic number, because the mean of its divisors is an integer number (4411800).

Almost surely, 2^90016623 is an apocalyptic number.

90016623 is a deficient number, since it is larger than the sum of its proper divisors (51160977).

90016623 is a wasteful number, since it uses less digits than its factorization.

90016623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 90016623 is about 9487.7090490803. The cubic root of 90016623 is about 448.1680634725.

The spelling of 90016623 in words is "ninety million, sixteen thousand, six hundred twenty-three".