100019391 has 8 divisors (see below), whose sum is σ = 134679984. Its totient is φ = 66019200.

The previous prime is 100019329. The next prime is 100019393. The reversal of 100019391 is 193910001.

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

It is not a de Polignac number, because 100019391 - 2⁹ = 100018879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100019393) 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, 164746 + ... + 165351.

It is an arithmetic number, because the mean of its divisors is an integer number (16834998).

Almost surely, 2^100019391 is an apocalyptic number.

100019391 is a deficient number, since it is larger than the sum of its proper divisors (34660593).

100019391 is a wasteful number, since it uses less digits than its factorization.

100019391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330201.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 100019391 is about 10000.9695030032. The cubic root of 100019391 is about 464.1888831053.

Adding to 100019391 its reverse (193910001), we get a palindrome (293929392).

The spelling of 100019391 in words is "one hundred million, nineteen thousand, three hundred ninety-one".