100439918 has 4 divisors (see below), whose sum is σ = 150659880. Its totient is φ = 50219958.

The previous prime is 100439891. The next prime is 100439921. The reversal of 100439918 is 819934001.

It is a semiprime because it is the product of two primes.

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25109978 + ... + 25109981.

It is an arithmetic number, because the mean of its divisors is an integer number (37664970).

Almost surely, 2^100439918 is an apocalyptic number.

100439918 is a deficient number, since it is larger than the sum of its proper divisors (50219962).

100439918 is an equidigital number, since it uses as much as digits as its factorization.

100439918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50219961.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 100439918 is about 10021.9717620835. The cubic root of 100439918 is about 464.8385272004.

The spelling of 100439918 in words is "one hundred million, four hundred thirty-nine thousand, nine hundred eighteen".