1992661 has 8 divisors (see below), whose sum is σ = 2195424. Its totient is φ = 1793520.

The previous prime is 1992643. The next prime is 1992673. The reversal of 1992661 is 1662991.

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 1992661 - 2⁷ = 1992533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 2023.

It is an arithmetic number, because the mean of its divisors is an integer number (274428).

2^1992661 is an apocalyptic number.

1992661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1992661 is a deficient number, since it is larger than the sum of its proper divisors (202763).

1992661 is a wasteful number, since it uses less digits than its factorization.

1992661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811.

The product of its digits is 5832, while the sum is 34.

The square root of 1992661 is about 1411.6164493233. The cubic root of 1992661 is about 125.8378067598.

The spelling of 1992661 in words is "one million, nine hundred ninety-two thousand, six hundred sixty-one".