1966013 has 4 divisors (see below), whose sum is σ = 2246880. Its totient is φ = 1685148.

The previous prime is 1966009. The next prime is 1966031. The reversal of 1966013 is 3106691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1966013 - 2² = 1966009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966043) 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, 140423 + ... + 140436.

It is an arithmetic number, because the mean of its divisors is an integer number (561720).

2^1966013 is an apocalyptic number.

It is an amenable number.

1966013 is a deficient number, since it is larger than the sum of its proper divisors (280867).

1966013 is an equidigital number, since it uses as much as digits as its factorization.

1966013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280866.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1966013 is about 1402.1458554658. The cubic root of 1966013 is about 125.2743414536.

The spelling of 1966013 in words is "one million, nine hundred sixty-six thousand, thirteen".