64797857 has 4 divisors (see below), whose sum is σ = 64905216. Its totient is φ = 64690500.

The previous prime is 64797839. The next prime is 64797881. The reversal of 64797857 is 75879746.

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 64797857 - 2¹⁴ = 64781473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64797799 and 64797808.

It is not an unprimeable number, because it can be changed into a prime (64797827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52769 + ... + 53982.

It is an arithmetic number, because the mean of its divisors is an integer number (16226304).

Almost surely, 2^64797857 is an apocalyptic number.

It is an amenable number.

64797857 is a deficient number, since it is larger than the sum of its proper divisors (107359).

64797857 is a wasteful number, since it uses less digits than its factorization.

64797857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107358.

The product of its digits is 2963520, while the sum is 53.

The square root of 64797857 is about 8049.7116097411. The cubic root of 64797857 is about 401.6553422387.

The spelling of 64797857 in words is "sixty-four million, seven hundred ninety-seven thousand, eight hundred fifty-seven".