64570109 has 2 divisors, whose sum is σ = 64570110. Its totient is φ = 64570108.

The previous prime is 64570091. The next prime is 64570139. The reversal of 64570109 is 90107546.

It is a happy number.

Together with previous prime (64570091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 12802084 = 7195^2 + 3578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64570109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64570139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32285054 + 32285055.

It is an arithmetic number, because the mean of its divisors is an integer number (32285055).

Almost surely, 2^64570109 is an apocalyptic number.

It is an amenable number.

64570109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64570109 is an equidigital number, since it uses as much as digits as its factorization.

64570109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 64570109 is about 8035.5528123459. The cubic root of 64570109 is about 401.1842176946.

The spelling of 64570109 in words is "sixty-four million, five hundred seventy thousand, one hundred nine".