1861373 has 4 divisors (see below), whose sum is σ = 1959360. Its totient is φ = 1763388.

The previous prime is 1861351. The next prime is 1861397. The reversal of 1861373 is 3731681.

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 1861373 - 2⁶ = 1861309 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 (1861303) 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, 48965 + ... + 49002.

It is an arithmetic number, because the mean of its divisors is an integer number (489840).

2^1861373 is an apocalyptic number.

It is an amenable number.

1861373 is a deficient number, since it is larger than the sum of its proper divisors (97987).

1861373 is an equidigital number, since it uses as much as digits as its factorization.

1861373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97986.

The product of its digits is 3024, while the sum is 29.

The square root of 1861373 is about 1364.3214430624. The cubic root of 1861373 is about 123.0111475564.

The spelling of 1861373 in words is "one million, eight hundred sixty-one thousand, three hundred seventy-three".