108987945 has 32 divisors (see below), whose sum is σ = 196801920. Its totient is φ = 51018240.

The previous prime is 108987943. The next prime is 108987973. The reversal of 108987945 is 549789801.

It is not a de Polignac number, because 108987945 - 2¹ = 108987943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108987943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6604 + ... + 16173.

It is an arithmetic number, because the mean of its divisors is an integer number (6150060).

Almost surely, 2^108987945 is an apocalyptic number.

108987945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

108987945 is a deficient number, since it is larger than the sum of its proper divisors (87813975).

108987945 is a wasteful number, since it uses less digits than its factorization.

108987945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22825.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 108987945 is about 10439.7291631536. The cubic root of 108987945 is about 477.6680073621.

The spelling of 108987945 in words is "one hundred eight million, nine hundred eighty-seven thousand, nine hundred forty-five".