64213743 has 32 divisors (see below), whose sum is σ = 102332160. Its totient is φ = 35356160.

The previous prime is 64213733. The next prime is 64213757. The reversal of 64213743 is 34731246.

It is a cyclic number.

It is not a de Polignac number, because 64213743 - 2⁹ = 64213231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64213743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64213733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14296 + ... + 18242.

It is an arithmetic number, because the mean of its divisors is an integer number (3197880).

Almost surely, 2^64213743 is an apocalyptic number.

64213743 is a deficient number, since it is larger than the sum of its proper divisors (38118417).

64213743 is a wasteful number, since it uses less digits than its factorization.

64213743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007.

The product of its digits is 12096, while the sum is 30.

The square root of 64213743 is about 8013.3478022609. The cubic root of 64213743 is about 400.4448031088. Note that the first 3 decimals are identical.

Adding to 64213743 its reverse (34731246), we get a palindrome (98944989).

The spelling of 64213743 in words is "sixty-four million, two hundred thirteen thousand, seven hundred forty-three".