100649845 has 16 divisors (see below), whose sum is σ = 122964912. Its totient is φ = 79073280.

The previous prime is 100649803. The next prime is 100649869. The reversal of 100649845 is 548946001.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 28976689 + 71673156 = 5383^2 + 8466^2 .

It is not a de Polignac number, because 100649845 - 2¹¹ = 100647797 is a prime.

It is a Duffinian 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, 113805 + ... + 114685.

It is an arithmetic number, because the mean of its divisors is an integer number (7685307).

Almost surely, 2^100649845 is an apocalyptic number.

It is an amenable number.

100649845 is a deficient number, since it is larger than the sum of its proper divisors (22315067).

100649845 is an equidigital number, since it uses as much as digits as its factorization.

100649845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 100649845 is about 10032.4396335089. The cubic root of 100649845 is about 465.1621510264.

The spelling of 100649845 in words is "one hundred million, six hundred forty-nine thousand, eight hundred forty-five".