64246309 has 2 divisors, whose sum is σ = 64246310. Its totient is φ = 64246308.

The previous prime is 64246289. The next prime is 64246361. The reversal of 64246309 is 90364246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 6084 = 8015^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 64246309 - 2¹³ = 64238117 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64246109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32123154 + 32123155.

It is an arithmetic number, because the mean of its divisors is an integer number (32123155).

Almost surely, 2^64246309 is an apocalyptic number.

It is an amenable number.

64246309 is a deficient number, since it is larger than the sum of its proper divisors (1).

64246309 is an equidigital number, since it uses as much as digits as its factorization.

64246309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 64246309 is about 8015.3795293798. The cubic root of 64246309 is about 400.5124868626.

The spelling of 64246309 in words is "sixty-four million, two hundred forty-six thousand, three hundred nine".