100999955 has 8 divisors (see below), whose sum is σ = 138514272. Its totient is φ = 69257088.

The previous prime is 100999949. The next prime is 100999979. The reversal of 100999955 is 559999001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100999955 - 2⁴ = 100999939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1442822 + ... + 1442891.

It is an arithmetic number, because the mean of its divisors is an integer number (17314284).

Almost surely, 2^100999955 is an apocalyptic number.

100999955 is a deficient number, since it is larger than the sum of its proper divisors (37514317).

100999955 is an equidigital number, since it uses as much as digits as its factorization.

100999955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885725.

The product of its (nonzero) digits is 164025, while the sum is 47.

The square root of 100999955 is about 10049.8733822870. The cubic root of 100999955 is about 465.7008816169.

The spelling of 100999955 in words is "one hundred million, nine hundred ninety-nine thousand, nine hundred fifty-five".