19910119 has 8 divisors (see below), whose sum is σ = 21013040. Its totient is φ = 18812736.

The previous prime is 19910113. The next prime is 19910141. The reversal of 19910119 is 91101991.

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

It is not a de Polignac number, because 19910119 - 2¹³ = 19901927 is a prime.

It is a super-2 number, since 2×19910119² = 792825677188322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19910113) 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, 7537 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (2626630).

Almost surely, 2^19910119 is an apocalyptic number.

19910119 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19910119 is a deficient number, since it is larger than the sum of its proper divisors (1102921).

19910119 is a wasteful number, since it uses less digits than its factorization.

19910119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 19910119 is about 4462.0756380859. The cubic root of 19910119 is about 271.0345267212.

The spelling of 19910119 in words is "nineteen million, nine hundred ten thousand, one hundred nineteen".