1992289 has 8 divisors (see below), whose sum is σ = 2156672. Its totient is φ = 1829520.

The previous prime is 1992269. The next prime is 1992299. The reversal of 1992289 is 9822991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1992289 - 2⁵ = 1992257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992259) 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 7 ways as a sum of consecutive naturals, for example, 4072 + ... + 4534.

It is an arithmetic number, because the mean of its divisors is an integer number (269584).

2^1992289 is an apocalyptic number.

It is an amenable number.

1992289 is a deficient number, since it is larger than the sum of its proper divisors (164383).

1992289 is a wasteful number, since it uses less digits than its factorization.

1992289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 23328, while the sum is 40.

The square root of 1992289 is about 1411.4846793359. The cubic root of 1992289 is about 125.8299755937.

The spelling of 1992289 in words is "one million, nine hundred ninety-two thousand, two hundred eighty-nine".