64807109 has 2 divisors, whose sum is σ = 64807110. Its totient is φ = 64807108.

The previous prime is 64807087. The next prime is 64807117. The reversal of 64807109 is 90170846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 52900 = 8047^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 64807109 - 2²⁴ = 48029893 is a prime.

It is a super-2 number, since 2×64807109² = 8399922753875762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64807139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32403554 + 32403555.

It is an arithmetic number, because the mean of its divisors is an integer number (32403555).

Almost surely, 2^64807109 is an apocalyptic number.

It is an amenable number.

64807109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64807109 is an equidigital number, since it uses as much as digits as its factorization.

64807109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 64807109 is about 8050.2862682019. The cubic root of 64807109 is about 401.6744577802.

The spelling of 64807109 in words is "sixty-four million, eight hundred seven thousand, one hundred nine".