1918537 has 2 divisors, whose sum is σ = 1918538. Its totient is φ = 1918536.

The previous prime is 1918529. The next prime is 1918549. The reversal of 1918537 is 7358191.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1042441 + 876096 = 1021^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918537 - 2³ = 1918529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1918507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959268 + 959269.

It is an arithmetic number, because the mean of its divisors is an integer number (959269).

2^1918537 is an apocalyptic number.

It is an amenable number.

1918537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918537 is an equidigital number, since it uses as much as digits as its factorization.

1918537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 34.

The square root of 1918537 is about 1385.1126307994. The cubic root of 1918537 is about 124.2577235974.

The spelling of 1918537 in words is "one million, nine hundred eighteen thousand, five hundred thirty-seven".