64685429 has 2 divisors, whose sum is σ = 64685430. Its totient is φ = 64685428.

The previous prime is 64685393. The next prime is 64685441. The reversal of 64685429 is 92458646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36276529 + 28408900 = 6023^2 + 5330^2 .

It is a cyclic number.

It is not a de Polignac number, because 64685429 - 2¹² = 64681333 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64685429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64685449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32342714 + 32342715.

It is an arithmetic number, because the mean of its divisors is an integer number (32342715).

Almost surely, 2^64685429 is an apocalyptic number.

It is an amenable number.

64685429 is a deficient number, since it is larger than the sum of its proper divisors (1).

64685429 is an equidigital number, since it uses as much as digits as its factorization.

64685429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The square root of 64685429 is about 8042.7252222117. The cubic root of 64685429 is about 401.4229094035.

The spelling of 64685429 in words is "sixty-four million, six hundred eighty-five thousand, four hundred twenty-nine".