64504147 has 2 divisors, whose sum is σ = 64504148. Its totient is φ = 64504146.

The previous prime is 64504117. The next prime is 64504249. The reversal of 64504147 is 74140546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64504147 - 2¹¹ = 64502099 is a prime.

It is not a weakly prime, because it can be changed into another prime (64504117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32252073 + 32252074.

It is an arithmetic number, because the mean of its divisors is an integer number (32252074).

Almost surely, 2^64504147 is an apocalyptic number.

64504147 is a deficient number, since it is larger than the sum of its proper divisors (1).

64504147 is an equidigital number, since it uses as much as digits as its factorization.

64504147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 64504147 is about 8031.4473788975. The cubic root of 64504147 is about 401.0475603981.

The spelling of 64504147 in words is "sixty-four million, five hundred four thousand, one hundred forty-seven".