1939919 has 4 divisors (see below), whose sum is σ = 2042040. Its totient is φ = 1837800.

The previous prime is 1939913. The next prime is 1939937. The reversal of 1939919 is 9199391.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1939919 - 2¹² = 1935823 is a prime.

It is a super-2 number, since 2×1939919² = 7526571453122, 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 (1939913) 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, 51032 + ... + 51069.

It is an arithmetic number, because the mean of its divisors is an integer number (510510).

2^1939919 is an apocalyptic number.

1939919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1939919 is a deficient number, since it is larger than the sum of its proper divisors (102121).

1939919 is a wasteful number, since it uses less digits than its factorization.

1939919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102120.

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

The square root of 1939919 is about 1392.8097501095. The cubic root of 1939919 is about 124.7176346387.

The spelling of 1939919 in words is "one million, nine hundred thirty-nine thousand, nine hundred nineteen".