1653421453 has 4 divisors (see below), whose sum is σ = 1653549120. Its totient is φ = 1653293788.

The previous prime is 1653421417. The next prime is 1653421463. The reversal of 1653421453 is 3541243561.

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 a de Polignac number, because none of the positive numbers 2^k-1653421453 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 (1653421403) 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, 41893 + ... + 71146.

It is an arithmetic number, because the mean of its divisors is an integer number (413387280).

Almost surely, 2^1653421453 is an apocalyptic number.

It is an amenable number.

1653421453 is a deficient number, since it is larger than the sum of its proper divisors (127667).

1653421453 is a wasteful number, since it uses less digits than its factorization.

1653421453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127666.

The product of its digits is 43200, while the sum is 34.

The square root of 1653421453 is about 40662.2853883055. The cubic root of 1653421453 is about 1182.4819570332.

The spelling of 1653421453 in words is "one billion, six hundred fifty-three million, four hundred twenty-one thousand, four hundred fifty-three".