1936661 has 4 divisors (see below), whose sum is σ = 1941324. Its totient is φ = 1932000.

The previous prime is 1936643. The next prime is 1936679. The reversal of 1936661 is 1666391.

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

It is an interprime number because it is at equal distance from previous prime (1936643) and next prime (1936679).

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 1612900 = 569^2 + 1270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1936661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1936621) 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 3 ways as a sum of consecutive naturals, for example, 1640 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (485331).

2^1936661 is an apocalyptic number.

It is an amenable number.

1936661 is a deficient number, since it is larger than the sum of its proper divisors (4663).

1936661 is an equidigital number, since it uses as much as digits as its factorization.

1936661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662.

The product of its digits is 5832, while the sum is 32.

The square root of 1936661 is about 1391.6396803771. The cubic root of 1936661 is about 124.6477764407.

The spelling of 1936661 in words is "one million, nine hundred thirty-six thousand, six hundred sixty-one".