1868961 has 4 divisors (see below), whose sum is σ = 2491952. Its totient is φ = 1245972.

The previous prime is 1868947. The next prime is 1868983. The reversal of 1868961 is 1698681.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1698681 = 3 ⋅566227.

It is not a de Polignac number, because 1868961 - 2¹⁸ = 1606817 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868261) 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, 311491 + ... + 311496.

It is an arithmetic number, because the mean of its divisors is an integer number (622988).

2^1868961 is an apocalyptic number.

It is an amenable number.

1868961 is a deficient number, since it is larger than the sum of its proper divisors (622991).

1868961 is an equidigital number, since it uses as much as digits as its factorization.

1868961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622990.

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

The square root of 1868961 is about 1367.0994843098. The cubic root of 1868961 is about 123.1780750676.

The spelling of 1868961 in words is "one million, eight hundred sixty-eight thousand, nine hundred sixty-one".