64142647 has 2 divisors, whose sum is σ = 64142648. Its totient is φ = 64142646.

The previous prime is 64142641. The next prime is 64142657. The reversal of 64142647 is 74624146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64142647 - 2¹⁵ = 64109879 is a prime.

It is a super-2 number, since 2×64142647² = 8228558328333218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64142641) 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, 32071323 + 32071324.

It is an arithmetic number, because the mean of its divisors is an integer number (32071324).

Almost surely, 2^64142647 is an apocalyptic number.

64142647 is a deficient number, since it is larger than the sum of its proper divisors (1).

64142647 is an equidigital number, since it uses as much as digits as its factorization.

64142647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 34.

The square root of 64142647 is about 8008.9104752145. The cubic root of 64142647 is about 400.2969607313.

The spelling of 64142647 in words is "sixty-four million, one hundred forty-two thousand, six hundred forty-seven".