647262547 has 4 divisors (see below), whose sum is σ = 668142016. Its totient is φ = 626383080.

The previous prime is 647262523. The next prime is 647262559. The reversal of 647262547 is 745262746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745262746 = 2 ⋅372631373.

It is a cyclic number.

It is not a de Polignac number, because 647262547 - 2⁷ = 647262419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647262587) 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, 10439688 + ... + 10439749.

It is an arithmetic number, because the mean of its divisors is an integer number (167035504).

Almost surely, 2^647262547 is an apocalyptic number.

647262547 is a deficient number, since it is larger than the sum of its proper divisors (20879469).

647262547 is a wasteful number, since it uses less digits than its factorization.

647262547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20879468.

The product of its digits is 564480, while the sum is 43.

The square root of 647262547 is about 25441.3550543205. The cubic root of 647262547 is about 865.0213486662.

The spelling of 647262547 in words is "six hundred forty-seven million, two hundred sixty-two thousand, five hundred forty-seven".