64093621 has 8 divisors (see below), whose sum is σ = 67976280. Its totient is φ = 60223488.

The previous prime is 64093613. The next prime is 64093637. The reversal of 64093621 is 12639046.

It can be written as a sum of positive squares in 4 ways, for example, as 27973521 + 36120100 = 5289^2 + 6010^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64093621 - 2³ = 64093613 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8725 + ... + 14293.

It is an arithmetic number, because the mean of its divisors is an integer number (8497035).

Almost surely, 2^64093621 is an apocalyptic number.

It is an amenable number.

64093621 is a deficient number, since it is larger than the sum of its proper divisors (3882659).

64093621 is a wasteful number, since it uses less digits than its factorization.

64093621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6263.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 64093621 is about 8005.8491741976. The cubic root of 64093621 is about 400.1949487221.

The spelling of 64093621 in words is "sixty-four million, ninety-three thousand, six hundred twenty-one".