1889739 has 6 divisors (see below), whose sum is σ = 2729636. Its totient is φ = 1259820.

The previous prime is 1889717. The next prime is 1889743. The reversal of 1889739 is 9379881.

It is not a de Polignac number, because 1889739 - 2⁵ = 1889707 is a prime.

It is a super-2 number, since 2×1889739² = 7142226976242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1889694 and 1889703.

It is not an unprimeable number, because it can be changed into a prime (1889039) 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 5 ways as a sum of consecutive naturals, for example, 104977 + ... + 104994.

2^1889739 is an apocalyptic number.

1889739 is a deficient number, since it is larger than the sum of its proper divisors (839897).

1889739 is a wasteful number, since it uses less digits than its factorization.

1889739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209977 (or 209974 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1889739 is about 1374.6777804271. The cubic root of 1889739 is about 123.6328674335.

It can be divided in two parts, 1889 and 739, that added together give a triangular number (2628 = T₇₂).

The spelling of 1889739 in words is "one million, eight hundred eighty-nine thousand, seven hundred thirty-nine".