1800137 has 2 divisors, whose sum is σ = 1800138. Its totient is φ = 1800136.

The previous prime is 1800121. The next prime is 1800157. The reversal of 1800137 is 7310081.

It is an a-pointer prime, because the next prime (1800157) can be obtained adding 1800137 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 491401 = 1144^2 + 701^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800137 - 2⁴ = 1800121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1800157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900068 + 900069.

It is an arithmetic number, because the mean of its divisors is an integer number (900069).

2^1800137 is an apocalyptic number.

It is an amenable number.

1800137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800137 is an equidigital number, since it uses as much as digits as its factorization.

1800137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1800137 is about 1341.6918424139. The cubic root of 1800137 is about 121.6471259875.

The spelling of 1800137 in words is "one million, eight hundred thousand, one hundred thirty-seven".