1939929 has 4 divisors (see below), whose sum is σ = 2586576. Its totient is φ = 1293284.

The previous prime is 1939913. The next prime is 1939937. The reversal of 1939929 is 9299391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1939929 - 2⁴ = 1939913 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1939909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323319 + ... + 323324.

It is an arithmetic number, because the mean of its divisors is an integer number (646644).

2^1939929 is an apocalyptic number.

It is an amenable number.

1939929 is a deficient number, since it is larger than the sum of its proper divisors (646647).

1939929 is an equidigital number, since it uses as much as digits as its factorization.

1939929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646646.

The product of its digits is 39366, while the sum is 42.

The square root of 1939929 is about 1392.8133399706. The cubic root of 1939929 is about 124.7178489387.

The spelling of 1939929 in words is "one million, nine hundred thirty-nine thousand, nine hundred twenty-nine".