64612547 has 2 divisors, whose sum is σ = 64612548. Its totient is φ = 64612546.

The previous prime is 64612517. The next prime is 64612549. The reversal of 64612547 is 74521646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64612547 is a prime.

Together with 64612549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64612549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32306273 + 32306274.

It is an arithmetic number, because the mean of its divisors is an integer number (32306274).

Almost surely, 2^64612547 is an apocalyptic number.

64612547 is a deficient number, since it is larger than the sum of its proper divisors (1).

64612547 is an equidigital number, since it uses as much as digits as its factorization.

64612547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 64612547 is about 8038.1930183344. The cubic root of 64612547 is about 401.2720897638.

Subtracting 64612547 from its reverse (74521646), we obtain a palindrome (9909099).

The spelling of 64612547 in words is "sixty-four million, six hundred twelve thousand, five hundred forty-seven".