1887961 has 4 divisors (see below), whose sum is σ = 1914624. Its totient is φ = 1861300.

The previous prime is 1887947. The next prime is 1887967. The reversal of 1887961 is 1697881.

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 1887961 - 2¹¹ = 1885913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1887967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13225 + ... + 13366.

It is an arithmetic number, because the mean of its divisors is an integer number (478656).

2^1887961 is an apocalyptic number.

It is an amenable number.

1887961 is a deficient number, since it is larger than the sum of its proper divisors (26663).

1887961 is an equidigital number, since it uses as much as digits as its factorization.

1887961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26662.

The product of its digits is 24192, while the sum is 40.

The square root of 1887961 is about 1374.0309312384. The cubic root of 1887961 is about 123.5940810870.

The spelling of 1887961 in words is "one million, eight hundred eighty-seven thousand, nine hundred sixty-one".