64892609 has 2 divisors, whose sum is σ = 64892610. Its totient is φ = 64892608.

The previous prime is 64892599. The next prime is 64892647. The reversal of 64892609 is 90629846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50452609 + 14440000 = 7103^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 64892609 - 2¹⁶ = 64827073 is a prime.

It is a super-2 number, since 2×64892609² = 8422101405653762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64892609.

It is not a weakly prime, because it can be changed into another prime (64892699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32446304 + 32446305.

It is an arithmetic number, because the mean of its divisors is an integer number (32446305).

Almost surely, 2^64892609 is an apocalyptic number.

It is an amenable number.

64892609 is a deficient number, since it is larger than the sum of its proper divisors (1).

64892609 is an equidigital number, since it uses as much as digits as its factorization.

64892609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 64892609 is about 8055.5948880266. The cubic root of 64892609 is about 401.8510231538.

The spelling of 64892609 in words is "sixty-four million, eight hundred ninety-two thousand, six hundred nine".