100090645 has 16 divisors (see below), whose sum is σ = 127521648. Its totient is φ = 75156480.

The previous prime is 100090637. The next prime is 100090649. The reversal of 100090645 is 546090001.

It can be written as a sum of positive squares in 8 ways, for example, as 2436721 + 97653924 = 1561^2 + 9882^2 .

It is not a de Polignac number, because 100090645 - 2³ = 100090637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100090649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34387 + ... + 37183.

It is an arithmetic number, because the mean of its divisors is an integer number (7970103).

Almost surely, 2^100090645 is an apocalyptic number.

It is an amenable number.

100090645 is a deficient number, since it is larger than the sum of its proper divisors (27431003).

100090645 is a wasteful number, since it uses less digits than its factorization.

100090645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 100090645 is about 10004.5312234007. The cubic root of 100090645 is about 464.2990866140.

The spelling of 100090645 in words is "one hundred million, ninety thousand, six hundred forty-five".