19190939 has 4 divisors (see below), whose sum is σ = 19201656. Its totient is φ = 19180224.

The previous prime is 19190933. The next prime is 19190971. The reversal of 19190939 is 93909191.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 19190939 - 2⁴ = 19190923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19190896 and 19190905.

It is not an unprimeable number, because it can be changed into a prime (19190933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1949 + ... + 6494.

It is an arithmetic number, because the mean of its divisors is an integer number (4800414).

Almost surely, 2^19190939 is an apocalyptic number.

19190939 is a deficient number, since it is larger than the sum of its proper divisors (10717).

19190939 is an equidigital number, since it uses as much as digits as its factorization.

19190939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10716.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 19190939 is about 4380.7463975903. The cubic root of 19190939 is about 267.7310502662.

The spelling of 19190939 in words is "nineteen million, one hundred ninety thousand, nine hundred thirty-nine".