1889967 has 4 divisors (see below), whose sum is σ = 2519960. Its totient is φ = 1259976.

The previous prime is 1889957. The next prime is 1889969. The reversal of 1889967 is 7699881.

It is a happy number.

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

It is not a de Polignac number, because 1889967 - 2¹⁴ = 1873583 is a prime.

It is a super-2 number, since 2×1889967² = 7143950522178, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1889967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889969) 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, 314992 + ... + 314997.

It is an arithmetic number, because the mean of its divisors is an integer number (629990).

2^1889967 is an apocalyptic number.

1889967 is a deficient number, since it is larger than the sum of its proper divisors (629993).

1889967 is an equidigital number, since it uses as much as digits as its factorization.

1889967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629992.

The product of its digits is 217728, while the sum is 48.

The square root of 1889967 is about 1374.7607064504. The cubic root of 1889967 is about 123.6378394006.

The spelling of 1889967 in words is "one million, eight hundred eighty-nine thousand, nine hundred sixty-seven".