64399347 has 24 divisors (see below), whose sum is σ = 97147440. Its totient is φ = 42163200.

The previous prime is 64399331. The next prime is 64399381. The reversal of 64399347 is 74399346.

It is not a de Polignac number, because 64399347 - 2⁴ = 64399331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64399327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100147 + ... + 100787.

It is an arithmetic number, because the mean of its divisors is an integer number (4047810).

Almost surely, 2^64399347 is an apocalyptic number.

64399347 is a deficient number, since it is larger than the sum of its proper divisors (32748093).

64399347 is an equidigital number, since it uses as much as digits as its factorization.

64399347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 705 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 64399347 is about 8024.9203734367. The cubic root of 64399347 is about 400.8302484432.

Subtracting 64399347 from its reverse (74399346), we obtain a palindrome (9999999).

It can be divided in two parts, 64399 and 347, that added together give a palindrome (64746).

The spelling of 64399347 in words is "sixty-four million, three hundred ninety-nine thousand, three hundred forty-seven".