647252953 has 4 divisors (see below), whose sum is σ = 647398528. Its totient is φ = 647107380.

The previous prime is 647252939. The next prime is 647252981. The reversal of 647252953 is 359252746.

647252953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 647252953 - 2¹³ = 647244761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647255953) 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, 65901 + ... + 75082.

It is an arithmetic number, because the mean of its divisors is an integer number (161849632).

Almost surely, 2^647252953 is an apocalyptic number.

It is an amenable number.

647252953 is a deficient number, since it is larger than the sum of its proper divisors (145575).

647252953 is a wasteful number, since it uses less digits than its factorization.

647252953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145574.

The product of its digits is 453600, while the sum is 43.

The square root of 647252953 is about 25441.1665023442. The cubic root of 647252953 is about 865.0170747406.

The spelling of 647252953 in words is "six hundred forty-seven million, two hundred fifty-two thousand, nine hundred fifty-three".