90647645 has 16 divisors (see below), whose sum is σ = 119301120. Its totient is φ = 65572800.

The previous prime is 90647639. The next prime is 90647653. The reversal of 90647645 is 54674609.

90647645 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 90647645 - 2¹² = 90643549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6191 + ... + 14819.

It is an arithmetic number, because the mean of its divisors is an integer number (7456320).

Almost surely, 2^90647645 is an apocalyptic number.

It is an amenable number.

90647645 is a deficient number, since it is larger than the sum of its proper divisors (28653475).

90647645 is a wasteful number, since it uses less digits than its factorization.

90647645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8836.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 90647645 is about 9520.9056817091. The cubic root of 90647645 is about 449.2128543705.

The spelling of 90647645 in words is "ninety million, six hundred forty-seven thousand, six hundred forty-five".