1866737 has 2 divisors, whose sum is σ = 1866738. Its totient is φ = 1866736.

The previous prime is 1866721. The next prime is 1866751. The reversal of 1866737 is 7376681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 6241 = 1364^2 + 79^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866737 - 2⁴ = 1866721 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1866737.

It is not a weakly prime, because it can be changed into another prime (1866757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933368 + 933369.

It is an arithmetic number, because the mean of its divisors is an integer number (933369).

2^1866737 is an apocalyptic number.

It is an amenable number.

1866737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866737 is an equidigital number, since it uses as much as digits as its factorization.

1866737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 1866737 is about 1366.2858412499. The cubic root of 1866737 is about 123.1291964351.

The spelling of 1866737 in words is "one million, eight hundred sixty-six thousand, seven hundred thirty-seven".