64093661 has 4 divisors (see below), whose sum is σ = 64117500. Its totient is φ = 64069824.

The previous prime is 64093651. The next prime is 64093699. The reversal of 64093661 is 16639046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28153636 + 35940025 = 5306^2 + 5995^2 .

It is a cyclic number.

It is not a de Polignac number, because 64093661 - 2¹⁸ = 63831517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64093651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286 + ... + 13463.

It is an arithmetic number, because the mean of its divisors is an integer number (16029375).

Almost surely, 2^64093661 is an apocalyptic number.

It is an amenable number.

64093661 is a deficient number, since it is larger than the sum of its proper divisors (23839).

64093661 is a wasteful number, since it uses less digits than its factorization.

64093661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23838.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 64093661 is about 8005.8516723707. The cubic root of 64093661 is about 400.1950319742.

The spelling of 64093661 in words is "sixty-four million, ninety-three thousand, six hundred sixty-one".