64997853 has 4 divisors (see below), whose sum is σ = 86663808. Its totient is φ = 43331900.

The previous prime is 64997837. The next prime is 64997887. The reversal of 64997853 is 35879946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64997853 - 2⁴ = 64997837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64997796 and 64997805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64997753) 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, 10832973 + ... + 10832978.

It is an arithmetic number, because the mean of its divisors is an integer number (21665952).

Almost surely, 2^64997853 is an apocalyptic number.

It is an amenable number.

64997853 is a deficient number, since it is larger than the sum of its proper divisors (21665955).

64997853 is a wasteful number, since it uses less digits than its factorization.

64997853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21665954.

The product of its digits is 1632960, while the sum is 51.

The square root of 64997853 is about 8062.1245959114. The cubic root of 64997853 is about 402.0681488880.

The spelling of 64997853 in words is "sixty-four million, nine hundred ninety-seven thousand, eight hundred fifty-three".