647535253 has 16 divisors (see below), whose sum is σ = 698544000. Its totient is φ = 598067712.

The previous prime is 647535247. The next prime is 647535269. The reversal of 647535253 is 352535746.

It is a cyclic number.

It is not a de Polignac number, because 647535253 - 2⁵ = 647535221 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 (647535233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208768 + ... + 211846.

It is an arithmetic number, because the mean of its divisors is an integer number (43659000).

Almost surely, 2^647535253 is an apocalyptic number.

It is an amenable number.

647535253 is a deficient number, since it is larger than the sum of its proper divisors (51008747).

647535253 is a wasteful number, since it uses less digits than its factorization.

647535253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324.

The product of its digits is 378000, while the sum is 40.

The square root of 647535253 is about 25446.7139921837. The cubic root of 647535253 is about 865.1428158057.

The spelling of 647535253 in words is "six hundred forty-seven million, five hundred thirty-five thousand, two hundred fifty-three".