1653890389 has 4 divisors (see below), whose sum is σ = 1655364256. Its totient is φ = 1652416524.

The previous prime is 1653890363. The next prime is 1653890429. The reversal of 1653890389 is 9830983561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1653890389 - 2¹⁹ = 1653366101 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 (1653890089) 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, 735249 + ... + 737494.

It is an arithmetic number, because the mean of its divisors is an integer number (413841064).

Almost surely, 2^1653890389 is an apocalyptic number.

It is an amenable number.

1653890389 is a deficient number, since it is larger than the sum of its proper divisors (1473867).

1653890389 is a wasteful number, since it uses less digits than its factorization.

1653890389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473866.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 1653890389 is about 40668.0512073052. The cubic root of 1653890389 is about 1182.5937365483.

The spelling of 1653890389 in words is "one billion, six hundred fifty-three million, eight hundred ninety thousand, three hundred eighty-nine".