64641607 has 2 divisors, whose sum is σ = 64641608. Its totient is φ = 64641606.

The previous prime is 64641593. The next prime is 64641611. The reversal of 64641607 is 70614646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64641607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64641617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32320803 + 32320804.

It is an arithmetic number, because the mean of its divisors is an integer number (32320804).

Almost surely, 2^64641607 is an apocalyptic number.

64641607 is a deficient number, since it is larger than the sum of its proper divisors (1).

64641607 is an equidigital number, since it uses as much as digits as its factorization.

64641607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 64641607 is about 8040.0004353234. Note that the first 3 decimals coincide. The cubic root of 64641607 is about 401.3322391709.

The spelling of 64641607 in words is "sixty-four million, six hundred forty-one thousand, six hundred seven".