1940017653 has 18 divisors (see below), whose sum is σ = 3259758294. Its totient is φ = 1108581264.

The previous prime is 1940017621. The next prime is 1940017657. The reversal of 1940017653 is 3567100491.

It can be written as a sum of positive squares in only one way, i.e., 1247643684 + 692373969 = 35322^2 + 26313^2 .

It is not a de Polignac number, because 1940017653 - 2⁵ = 1940017621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940017657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2199126 + ... + 2200007.

It is an arithmetic number, because the mean of its divisors is an integer number (181097683).

Almost surely, 2^1940017653 is an apocalyptic number.

It is an amenable number.

1940017653 is a deficient number, since it is larger than the sum of its proper divisors (1319740641).

1940017653 is a wasteful number, since it uses less digits than its factorization.

1940017653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399153 (or 4399143 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1940017653 is about 44045.6314859942. The cubic root of 1940017653 is about 1247.1974874076.

The spelling of 1940017653 in words is "one billion, nine hundred forty million, seventeen thousand, six hundred fifty-three".