1918953 has 6 divisors (see below), whose sum is σ = 2771834. Its totient is φ = 1279296.

The previous prime is 1918933. The next prime is 1918967. The reversal of 1918953 is 3598191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 974169 + 944784 = 987^2 + 972^2 .

It is not a de Polignac number, because 1918953 - 2⁵ = 1918921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106600 + ... + 106617.

2^1918953 is an apocalyptic number.

It is an amenable number.

1918953 is a deficient number, since it is larger than the sum of its proper divisors (852881).

1918953 is a wasteful number, since it uses less digits than its factorization.

1918953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213223 (or 213220 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1918953 is about 1385.2627909534. The cubic root of 1918953 is about 124.2667039606.

The spelling of 1918953 in words is "one million, nine hundred eighteen thousand, nine hundred fifty-three".