646103453 has 4 divisors (see below), whose sum is σ = 646164288. Its totient is φ = 646042620.

The previous prime is 646103369. The next prime is 646103473. The reversal of 646103453 is 354301646.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 646103453 - 2¹² = 646099357 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 (646103473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9851 + ... + 37272.

It is an arithmetic number, because the mean of its divisors is an integer number (161541072).

Almost surely, 2^646103453 is an apocalyptic number.

It is an amenable number.

646103453 is a deficient number, since it is larger than the sum of its proper divisors (60835).

646103453 is a wasteful number, since it uses less digits than its factorization.

646103453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60834.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 646103453 is about 25418.5651247272. The cubic root of 646103453 is about 864.5046906508.

The spelling of 646103453 in words is "six hundred forty-six million, one hundred three thousand, four hundred fifty-three".