64945147 has 2 divisors, whose sum is σ = 64945148. Its totient is φ = 64945146.

The previous prime is 64945103. The next prime is 64945163. The reversal of 64945147 is 74154946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64945147 - 2¹⁹ = 64420859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64945247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32472573 + 32472574.

It is an arithmetic number, because the mean of its divisors is an integer number (32472574).

Almost surely, 2^64945147 is an apocalyptic number.

64945147 is a deficient number, since it is larger than the sum of its proper divisors (1).

64945147 is an equidigital number, since it uses as much as digits as its factorization.

64945147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 64945147 is about 8058.8551916510. The cubic root of 64945147 is about 401.9594420440.

It can be divided in two parts, 649 and 45147, that added together give a square (45796 = 214²).

The spelling of 64945147 in words is "sixty-four million, nine hundred forty-five thousand, one hundred forty-seven".