64909349 has 8 divisors (see below), whose sum is σ = 68834520. Its totient is φ = 60996096.

The previous prime is 64909331. The next prime is 64909387. The reversal of 64909349 is 94390946.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55606849 + 9302500 = 7457^2 + 3050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64909349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64909049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9857 + ... + 15065.

It is an arithmetic number, because the mean of its divisors is an integer number (8604315).

Almost surely, 2^64909349 is an apocalyptic number.

It is an amenable number.

64909349 is a deficient number, since it is larger than the sum of its proper divisors (3925171).

64909349 is a wasteful number, since it uses less digits than its factorization.

64909349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 64909349 is about 8056.6338504365. The cubic root of 64909349 is about 401.8855746375.

The spelling of 64909349 in words is "sixty-four million, nine hundred nine thousand, three hundred forty-nine".