64784375 has 12 divisors (see below), whose sum is σ = 80979192. Its totient is φ = 51825000.

The previous prime is 64784371. The next prime is 64784393. The reversal of 64784375 is 57348746.

It is not a de Polignac number, because 64784375 - 2² = 64784371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64784371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7241 + ... + 13490.

It is an arithmetic number, because the mean of its divisors is an integer number (6748266).

Almost surely, 2^64784375 is an apocalyptic number.

64784375 is a deficient number, since it is larger than the sum of its proper divisors (16194817).

64784375 is an frugal number, since it uses more digits than its factorization.

64784375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20756 (or 20736 counting only the distinct ones).

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

The square root of 64784375 is about 8048.8741448727. The cubic root of 64784375 is about 401.6274838435.

The spelling of 64784375 in words is "sixty-four million, seven hundred eighty-four thousand, three hundred seventy-five".