1986013 has 4 divisors (see below), whose sum is σ = 2090560. Its totient is φ = 1881468.

The previous prime is 1986001. The next prime is 1986029. The reversal of 1986013 is 3106891.

It is a happy number.

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 1986013 - 2¹³ = 1977821 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 (1986043) 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, 52245 + ... + 52282.

It is an arithmetic number, because the mean of its divisors is an integer number (522640).

2^1986013 is an apocalyptic number.

It is an amenable number.

1986013 is a deficient number, since it is larger than the sum of its proper divisors (104547).

1986013 is a wasteful number, since it uses less digits than its factorization.

1986013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104546.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1986013 is about 1409.2597347544. The cubic root of 1986013 is about 125.6977090377.

The spelling of 1986013 in words is "one million, nine hundred eighty-six thousand, thirteen".