64134247 has 2 divisors, whose sum is σ = 64134248. Its totient is φ = 64134246.

The previous prime is 64134233. The next prime is 64134269. The reversal of 64134247 is 74243146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64134247 is a prime.

It is a super-2 number, since 2×64134247² = 8226403276514018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64134227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32067123 + 32067124.

It is an arithmetic number, because the mean of its divisors is an integer number (32067124).

Almost surely, 2^64134247 is an apocalyptic number.

64134247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64134247 is an equidigital number, since it uses as much as digits as its factorization.

64134247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 64134247 is about 8008.3860421436. The cubic root of 64134247 is about 400.2794859236.

The spelling of 64134247 in words is "sixty-four million, one hundred thirty-four thousand, two hundred forty-seven".