1922889 has 4 divisors (see below), whose sum is σ = 2563856. Its totient is φ = 1281924.

The previous prime is 1922873. The next prime is 1922891. The reversal of 1922889 is 9882291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9882291 = 3 ⋅3294097.

It is not a de Polignac number, because 1922889 - 2⁴ = 1922873 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1922689) 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, 320479 + ... + 320484.

It is an arithmetic number, because the mean of its divisors is an integer number (640964).

2^1922889 is an apocalyptic number.

It is an amenable number.

1922889 is a deficient number, since it is larger than the sum of its proper divisors (640967).

1922889 is an equidigital number, since it uses as much as digits as its factorization.

1922889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640966.

The product of its digits is 20736, while the sum is 39.

The square root of 1922889 is about 1386.6827322787. The cubic root of 1922889 is about 124.3516078496.

It can be divided in two parts, 192 and 2889, that added together give a triangular number (3081 = T₇₈).

The spelling of 1922889 in words is "one million, nine hundred twenty-two thousand, eight hundred eighty-nine".