1992659 has 4 divisors (see below), whose sum is σ = 2035104. Its totient is φ = 1950216.

The previous prime is 1992643. The next prime is 1992673. The reversal of 1992659 is 9562991.

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

It is a cyclic number.

It is not a de Polignac number, because 1992659 - 2⁴ = 1992643 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21152 + ... + 21245.

It is an arithmetic number, because the mean of its divisors is an integer number (508776).

2^1992659 is an apocalyptic number.

1992659 is a deficient number, since it is larger than the sum of its proper divisors (42445).

1992659 is an equidigital number, since it uses as much as digits as its factorization.

1992659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42444.

The product of its digits is 43740, while the sum is 41.

The square root of 1992659 is about 1411.6157409154. The cubic root of 1992659 is about 125.8377646593.

The spelling of 1992659 in words is "one million, nine hundred ninety-two thousand, six hundred fifty-nine".