100191923 has 8 divisors (see below), whose sum is σ = 108444000. Its totient is φ = 92017728.

The previous prime is 100191919. The next prime is 100191937. The reversal of 100191923 is 329191001.

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 100191923 - 2² = 100191919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100191892 and 100191901.

It is not an unprimeable number, because it can be changed into a prime (100191913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16778 + ... + 21951.

It is an arithmetic number, because the mean of its divisors is an integer number (13555500).

Almost surely, 2^100191923 is an apocalyptic number.

100191923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100191923 is a deficient number, since it is larger than the sum of its proper divisors (8252077).

100191923 is a wasteful number, since it uses less digits than its factorization.

100191923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38941.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 100191923 is about 10009.5915501083. The cubic root of 100191923 is about 464.4556361478.

The spelling of 100191923 in words is "one hundred million, one hundred ninety-one thousand, nine hundred twenty-three".