100015399 has 8 divisors (see below), whose sum is σ = 111166992. Its totient is φ = 89207040.

The previous prime is 100015387. The next prime is 100015427. The reversal of 100015399 is 993510001.

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 100015399 - 2⁵ = 100015367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100015309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85194 + ... + 86359.

It is an arithmetic number, because the mean of its divisors is an integer number (13895874).

Almost surely, 2^100015399 is an apocalyptic number.

100015399 is a deficient number, since it is larger than the sum of its proper divisors (11151593).

100015399 is a wasteful number, since it uses less digits than its factorization.

100015399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171617.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 100015399 is about 10000.7699203611. The cubic root of 100015399 is about 464.1827074139.

It can be divided in two parts, 10001 and 5399, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 100015399 in words is "one hundred million, fifteen thousand, three hundred ninety-nine".