1912989 has 16 divisors (see below), whose sum is σ = 2772224. Its totient is φ = 1166400.

The previous prime is 1912969. The next prime is 1912991. The reversal of 1912989 is 9892191.

It is a happy number.

It is not a de Polignac number, because 1912989 - 2⁸ = 1912733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6924 + ... + 7194.

It is an arithmetic number, because the mean of its divisors is an integer number (173264).

2^1912989 is an apocalyptic number.

It is an amenable number.

1912989 is a deficient number, since it is larger than the sum of its proper divisors (859235).

1912989 is a wasteful number, since it uses less digits than its factorization.

1912989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 11664, while the sum is 39.

The square root of 1912989 is about 1383.1084556173. The cubic root of 1912989 is about 124.1378323408.

The spelling of 1912989 in words is "one million, nine hundred twelve thousand, nine hundred eighty-nine".