64134909 has 10 divisors (see below), whose sum is σ = 95806590. Its totient is φ = 42756552.

The previous prime is 64134893. The next prime is 64134919. The reversal of 64134909 is 90943146.

64134909 is a `hidden beast` number, since 641 + 3 + 4 + 9 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63154809 + 980100 = 7947^2 + 990^2 .

It is not a de Polignac number, because 64134909 - 2⁴ = 64134893 is a prime.

It is a super-2 number, since 2×64134909² = 8226573104876562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64134919) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 395814 + ... + 395975.

It is an arithmetic number, because the mean of its divisors is an integer number (9580659).

Almost surely, 2^64134909 is an apocalyptic number.

It is an amenable number.

64134909 is a deficient number, since it is larger than the sum of its proper divisors (31671681).

64134909 is an equidigital number, since it uses as much as digits as its factorization.

64134909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791801 (or 791792 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 64134909 is about 8008.4273737108. The cubic root of 64134909 is about 400.2808631602.

The spelling of 64134909 in words is "sixty-four million, one hundred thirty-four thousand, nine hundred nine".