647262479 has 2 divisors, whose sum is σ = 647262480. Its totient is φ = 647262478.

The previous prime is 647262463. The next prime is 647262523. The reversal of 647262479 is 974262746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647262479 - 2⁴ = 647262463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647262419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323631239 + 323631240.

It is an arithmetic number, because the mean of its divisors is an integer number (323631240).

Almost surely, 2^647262479 is an apocalyptic number.

647262479 is a deficient number, since it is larger than the sum of its proper divisors (1).

647262479 is an equidigital number, since it uses as much as digits as its factorization.

647262479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 47.

The square root of 647262479 is about 25441.3537179137. The cubic root of 647262479 is about 865.0213183738.

The spelling of 647262479 in words is "six hundred forty-seven million, two hundred sixty-two thousand, four hundred seventy-nine".