64857347 has 4 divisors (see below), whose sum is σ = 64875096. Its totient is φ = 64839600.

The previous prime is 64857283. The next prime is 64857371. The reversal of 64857347 is 74375846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64857347 - 2⁶ = 64857283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64857298 and 64857307.

It is not an unprimeable number, because it can be changed into a prime (64857047) 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, 1154 + ... + 11447.

It is an arithmetic number, because the mean of its divisors is an integer number (16218774).

Almost surely, 2^64857347 is an apocalyptic number.

64857347 is a deficient number, since it is larger than the sum of its proper divisors (17749).

64857347 is a wasteful number, since it uses less digits than its factorization.

64857347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17748.

The product of its digits is 564480, while the sum is 44.

The square root of 64857347 is about 8053.4059254455. The cubic root of 64857347 is about 401.7782226793.

The spelling of 64857347 in words is "sixty-four million, eight hundred fifty-seven thousand, three hundred forty-seven".