648693247 has 2 divisors, whose sum is σ = 648693248. Its totient is φ = 648693246.

The previous prime is 648693233. The next prime is 648693319. The reversal of 648693247 is 742396846.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648693247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648693247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648693217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324346623 + 324346624.

It is an arithmetic number, because the mean of its divisors is an integer number (324346624).

Almost surely, 2^648693247 is an apocalyptic number.

648693247 is a deficient number, since it is larger than the sum of its proper divisors (1).

648693247 is an equidigital number, since it uses as much as digits as its factorization.

648693247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The square root of 648693247 is about 25469.4571398764. The cubic root of 648693247 is about 865.6582233109.

The spelling of 648693247 in words is "six hundred forty-eight million, six hundred ninety-three thousand, two hundred forty-seven".