64459891 has 2 divisors, whose sum is σ = 64459892. Its totient is φ = 64459890.

The previous prime is 64459861. The next prime is 64459897. The reversal of 64459891 is 19895446.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64459891 - 2¹¹ = 64457843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64459897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32229945 + 32229946.

It is an arithmetic number, because the mean of its divisors is an integer number (32229946).

Almost surely, 2^64459891 is an apocalyptic number.

64459891 is a deficient number, since it is larger than the sum of its proper divisors (1).

64459891 is an equidigital number, since it uses as much as digits as its factorization.

64459891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 64459891 is about 8028.6917365160. The cubic root of 64459891 is about 400.9558204489.

The spelling of 64459891 in words is "sixty-four million, four hundred fifty-nine thousand, eight hundred ninety-one".