90687544 has 8 divisors (see below), whose sum is σ = 170039160. Its totient is φ = 45343768.

The previous prime is 90687539. The next prime is 90687563. The reversal of 90687544 is 44578609.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 90687544.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5667964 + ... + 5667979.

It is an arithmetic number, because the mean of its divisors is an integer number (21254895).

Almost surely, 2^90687544 is an apocalyptic number.

It is an amenable number.

90687544 is a deficient number, since it is larger than the sum of its proper divisors (79351616).

90687544 is a wasteful number, since it uses less digits than its factorization.

90687544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11335949 (or 11335945 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 90687544 is about 9523.0007875669. Note that the first 3 decimals coincide. The cubic root of 90687544 is about 449.2787524409.

The spelling of 90687544 in words is "ninety million, six hundred eighty-seven thousand, five hundred forty-four".