64793857 has 4 divisors (see below), whose sum is σ = 68204080. Its totient is φ = 61383636.

The previous prime is 64793831. The next prime is 64793879. The reversal of 64793857 is 75839746.

It is a happy number.

64793857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75839746 = 2 ⋅37919873.

It is a cyclic number.

It is not a de Polignac number, because 64793857 - 2¹¹ = 64791809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64793857.

It is not an unprimeable number, because it can be changed into a prime (64793887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705083 + ... + 1705120.

It is an arithmetic number, because the mean of its divisors is an integer number (17051020).

Almost surely, 2^64793857 is an apocalyptic number.

It is an amenable number.

64793857 is a deficient number, since it is larger than the sum of its proper divisors (3410223).

64793857 is a wasteful number, since it uses less digits than its factorization.

64793857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410222.

The product of its digits is 1270080, while the sum is 49.

The square root of 64793857 is about 8049.4631498007. The cubic root of 64793857 is about 401.6470772821.

The spelling of 64793857 in words is "sixty-four million, seven hundred ninety-three thousand, eight hundred fifty-seven".