64735789 has 2 divisors, whose sum is σ = 64735790. Its totient is φ = 64735788.

The previous prime is 64735787. The next prime is 64735799. The reversal of 64735789 is 98753746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49070025 + 15665764 = 7005^2 + 3958^2 .

It is a cyclic number.

It is not a de Polignac number, because 64735789 - 2¹ = 64735787 is a prime.

Together with 64735787, 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 (64735787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32367894 + 32367895.

It is an arithmetic number, because the mean of its divisors is an integer number (32367895).

Almost surely, 2^64735789 is an apocalyptic number.

It is an amenable number.

64735789 is a deficient number, since it is larger than the sum of its proper divisors (1).

64735789 is an equidigital number, since it uses as much as digits as its factorization.

64735789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 64735789 is about 8045.8553926851. The cubic root of 64735789 is about 401.5270565769.

The spelling of 64735789 in words is "sixty-four million, seven hundred thirty-five thousand, seven hundred eighty-nine".