64449479 has 2 divisors, whose sum is σ = 64449480. Its totient is φ = 64449478.

The previous prime is 64449467. The next prime is 64449493. The reversal of 64449479 is 97494446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64449479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64449409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32224739 + 32224740.

It is an arithmetic number, because the mean of its divisors is an integer number (32224740).

Almost surely, 2^64449479 is an apocalyptic number.

64449479 is a deficient number, since it is larger than the sum of its proper divisors (1).

64449479 is an equidigital number, since it uses as much as digits as its factorization.

64449479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 64449479 is about 8028.0432858823. The cubic root of 64449479 is about 400.9342309161.

The spelling of 64449479 in words is "sixty-four million, four hundred forty-nine thousand, four hundred seventy-nine".