1896681 has 4 divisors (see below), whose sum is σ = 2528912. Its totient is φ = 1264452.

The previous prime is 1896677. The next prime is 1896683. The reversal of 1896681 is 1866981.

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 not a de Polignac number, because 1896681 - 2² = 1896677 is a prime.

It is a super-2 number, since 2×1896681² = 7194797631522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1896683) 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, 316111 + ... + 316116.

It is an arithmetic number, because the mean of its divisors is an integer number (632228).

2^1896681 is an apocalyptic number.

It is an amenable number.

1896681 is a deficient number, since it is larger than the sum of its proper divisors (632231).

1896681 is an equidigital number, since it uses as much as digits as its factorization.

1896681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632230.

The product of its digits is 20736, while the sum is 39.

The square root of 1896681 is about 1377.2004211443. The cubic root of 1896681 is about 123.7840718344.

The spelling of 1896681 in words is "one million, eight hundred ninety-six thousand, six hundred eighty-one".