100191399 has 16 divisors (see below), whose sum is σ = 166552320. Its totient is φ = 52047360.

The previous prime is 100191391. The next prime is 100191407. The reversal of 100191399 is 993191001.

It is an interprime number because it is at equal distance from previous prime (100191391) and next prime (100191407).

It is not a de Polignac number, because 100191399 - 2³ = 100191391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100191391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216634 + ... + 217095.

It is an arithmetic number, because the mean of its divisors is an integer number (10409520).

Almost surely, 2^100191399 is an apocalyptic number.

100191399 is a deficient number, since it is larger than the sum of its proper divisors (66360921).

100191399 is a wasteful number, since it uses less digits than its factorization.

100191399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433750.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 100191399 is about 10009.5653751799. The cubic root of 100191399 is about 464.4548264512.

The spelling of 100191399 in words is "one hundred million, one hundred ninety-one thousand, three hundred ninety-nine".