647140553 has 4 divisors (see below), whose sum is σ = 647260800. Its totient is φ = 647020308.

The previous prime is 647140541. The next prime is 647140567. The reversal of 647140553 is 355041746.

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 647140553 - 2⁸ = 647140297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647140523) 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, 51653 + ... + 62946.

It is an arithmetic number, because the mean of its divisors is an integer number (161815200).

Almost surely, 2^647140553 is an apocalyptic number.

It is an amenable number.

647140553 is a deficient number, since it is larger than the sum of its proper divisors (120247).

647140553 is a wasteful number, since it uses less digits than its factorization.

647140553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120246.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 647140553 is about 25438.9573882264. The cubic root of 647140553 is about 864.9669997545.

The spelling of 647140553 in words is "six hundred forty-seven million, one hundred forty thousand, five hundred fifty-three".