1653902789 has 16 divisors (see below), whose sum is σ = 2100919680. Its totient is φ = 1264436160.

The previous prime is 1653902779. The next prime is 1653902797. The reversal of 1653902789 is 9872093561.

It is a cyclic number.

It is not a de Polignac number, because 1653902789 - 2¹² = 1653898693 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 (1653902779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198554 + ... + 206715.

It is an arithmetic number, because the mean of its divisors is an integer number (131307480).

Almost surely, 2^1653902789 is an apocalyptic number.

It is an amenable number.

1653902789 is a deficient number, since it is larger than the sum of its proper divisors (447016891).

1653902789 is a wasteful number, since it uses less digits than its factorization.

1653902789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405340.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 1653902789 is about 40668.2036608454. The cubic root of 1653902789 is about 1182.5966920294.

The spelling of 1653902789 in words is "one billion, six hundred fifty-three million, nine hundred two thousand, seven hundred eighty-nine".