100138955 has 8 divisors (see below), whose sum is σ = 137333472. Its totient is φ = 68666688.

The previous prime is 100138939. The next prime is 100138963. The reversal of 100138955 is 559831001.

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 100138955 - 2⁴ = 100138939 is a prime.

It is a super-3 number, since 3×100138955³ (a number of 25 digits) contains 333 as substring.

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, 1430522 + ... + 1430591.

It is an arithmetic number, because the mean of its divisors is an integer number (17166684).

Almost surely, 2^100138955 is an apocalyptic number.

100138955 is a deficient number, since it is larger than the sum of its proper divisors (37194517).

100138955 is an equidigital number, since it uses as much as digits as its factorization.

100138955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861125.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 100138955 is about 10006.9453381139. The cubic root of 100138955 is about 464.3737745168.

Adding to 100138955 its reverse (559831001), we get a palindrome (659969956).

The spelling of 100138955 in words is "one hundred million, one hundred thirty-eight thousand, nine hundred fifty-five".