64573247 has 2 divisors, whose sum is σ = 64573248. Its totient is φ = 64573246.

The previous prime is 64573141. The next prime is 64573307. The reversal of 64573247 is 74237546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64573247 - 2¹² = 64569151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64573247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64573447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32286623 + 32286624.

It is an arithmetic number, because the mean of its divisors is an integer number (32286624).

Almost surely, 2^64573247 is an apocalyptic number.

64573247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64573247 is an equidigital number, since it uses as much as digits as its factorization.

64573247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 38.

The square root of 64573247 is about 8035.7480672306. The cubic root of 64573247 is about 401.1907165515.

The spelling of 64573247 in words is "sixty-four million, five hundred seventy-three thousand, two hundred forty-seven".