647637053 has 4 divisors (see below), whose sum is σ = 740156640. Its totient is φ = 555117468.

The previous prime is 647636971. The next prime is 647637071. The reversal of 647637053 is 350736746.

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 an emirpimes, since its reverse is a distinct semiprime: 350736746 = 2 ⋅175368373.

It is a cyclic number.

It is not a de Polignac number, because 647637053 - 2¹⁶ = 647571517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 647637053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647637073) 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, 46259783 + ... + 46259796.

It is an arithmetic number, because the mean of its divisors is an integer number (185039160).

Almost surely, 2^647637053 is an apocalyptic number.

It is an amenable number.

647637053 is a deficient number, since it is larger than the sum of its proper divisors (92519587).

647637053 is an equidigital number, since it uses as much as digits as its factorization.

647637053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92519586.

The product of its (nonzero) digits is 317520, while the sum is 41.

The square root of 647637053 is about 25448.7141718398. The cubic root of 647637053 is about 865.1881502351.

The spelling of 647637053 in words is "six hundred forty-seven million, six hundred thirty-seven thousand, fifty-three".