64434047 has 2 divisors, whose sum is σ = 64434048. Its totient is φ = 64434046.

The previous prime is 64434043. The next prime is 64434049. The reversal of 64434047 is 74043446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64434047 - 2² = 64434043 is a prime.

Together with 64434049, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64434043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32217023 + 32217024.

It is an arithmetic number, because the mean of its divisors is an integer number (32217024).

Almost surely, 2^64434047 is an apocalyptic number.

64434047 is a deficient number, since it is larger than the sum of its proper divisors (1).

64434047 is an equidigital number, since it uses as much as digits as its factorization.

64434047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 64434047 is about 8027.0820974997. The cubic root of 64434047 is about 400.9022280148.

The spelling of 64434047 in words is "sixty-four million, four hundred thirty-four thousand, forty-seven".