64993853 has 8 divisors (see below), whose sum is σ = 66900480. Its totient is φ = 63114480.

The previous prime is 64993849. The next prime is 64993879. The reversal of 64993853 is 35839946.

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 64993853 - 2² = 64993849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64993798 and 64993807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64999853) 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 7 ways as a sum of consecutive naturals, for example, 1925 + ... + 11562.

It is an arithmetic number, because the mean of its divisors is an integer number (8362560).

Almost surely, 2^64993853 is an apocalyptic number.

It is an amenable number.

64993853 is a deficient number, since it is larger than the sum of its proper divisors (1906627).

64993853 is a wasteful number, since it uses less digits than its factorization.

64993853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13627.

The product of its digits is 699840, while the sum is 47.

The square root of 64993853 is about 8061.8765185284. The cubic root of 64993853 is about 402.0599008946.

The spelling of 64993853 in words is "sixty-four million, nine hundred ninety-three thousand, eight hundred fifty-three".