653987435389 has 4 divisors (see below), whose sum is σ = 657767709756. Its totient is φ = 650207161024.

The previous prime is 653987435281. The next prime is 653987435411. The reversal of 653987435389 is 983534789356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 404951504164 + 249035931225 = 636358^2 + 499035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653987435389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653987435789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1890136924 + ... + 1890137269.

It is an arithmetic number, because the mean of its divisors is an integer number (164441927439).

Almost surely, 2^653987435389 is an apocalyptic number.

It is an amenable number.

653987435389 is a deficient number, since it is larger than the sum of its proper divisors (3780274367).

653987435389 is a wasteful number, since it uses less digits than its factorization.

653987435389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780274366.

The product of its digits is 587865600, while the sum is 70.

The spelling of 653987435389 in words is "six hundred fifty-three billion, nine hundred eighty-seven million, four hundred thirty-five thousand, three hundred eighty-nine".