100919191819 has 8 divisors (see below), whose sum is σ = 102870911088. Its totient is φ = 98986149600.

The previous prime is 100919191801. The next prime is 100919191853. The reversal of 100919191819 is 918191919001.

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 100919191819 - 2⁵ = 100919191787 is a prime.

It is a super-2 number, since 2×100919191819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100919191889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4658352 + ... + 4679965.

It is an arithmetic number, because the mean of its divisors is an integer number (12858863886).

Almost surely, 2^100919191819 is an apocalyptic number.

100919191819 is a deficient number, since it is larger than the sum of its proper divisors (1951719269).

100919191819 is a wasteful number, since it uses less digits than its factorization.

100919191819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9338525.

The product of its (nonzero) digits is 52488, while the sum is 49.

It can be divided in two parts, 100 and 919191819, that added together give a palindrome (919191919).

The spelling of 100919191819 in words is "one hundred billion, nine hundred nineteen million, one hundred ninety-one thousand, eight hundred nineteen".