64746247 has 2 divisors, whose sum is σ = 64746248. Its totient is φ = 64746246.

The previous prime is 64746223. The next prime is 64746277. The reversal of 64746247 is 74264746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64746247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64746277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32373123 + 32373124.

It is an arithmetic number, because the mean of its divisors is an integer number (32373124).

Almost surely, 2^64746247 is an apocalyptic number.

64746247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64746247 is an equidigital number, since it uses as much as digits as its factorization.

64746247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 40.

The square root of 64746247 is about 8046.5052662631. The cubic root of 64746247 is about 401.5486775067.

It can be divided in two parts, 6474 and 6247, that added together give a palindrome (12721).

The spelling of 64746247 in words is "sixty-four million, seven hundred forty-six thousand, two hundred forty-seven".