1653730989 has 16 divisors (see below), whose sum is σ = 2216149632. Its totient is φ = 1096914368.

The previous prime is 1653730957. The next prime is 1653730997. The reversal of 1653730989 is 9890373561.

It is a cyclic number.

It is not a de Polignac number, because 1653730989 - 2⁵ = 1653730957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1653730919) 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 15 ways as a sum of consecutive naturals, for example, 619672 + ... + 622334.

It is an arithmetic number, because the mean of its divisors is an integer number (138509352).

Almost surely, 2^1653730989 is an apocalyptic number.

It is an amenable number.

1653730989 is a deficient number, since it is larger than the sum of its proper divisors (562418643).

1653730989 is a wasteful number, since it uses less digits than its factorization.

1653730989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The square root of 1653730989 is about 40666.0913907398. The cubic root of 1653730989 is about 1182.5557429990. Note that the first 3 decimals are identical.

The spelling of 1653730989 in words is "one billion, six hundred fifty-three million, seven hundred thirty thousand, nine hundred eighty-nine".