64671213 has 16 divisors (see below), whose sum is σ = 91518336. Its totient is φ = 40481280.

The previous prime is 64671197. The next prime is 64671241. The reversal of 64671213 is 31217646.

It is not a de Polignac number, because 64671213 - 2⁴ = 64671197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64671413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24393 + ... + 26913.

It is an arithmetic number, because the mean of its divisors is an integer number (5719896).

Almost surely, 2^64671213 is an apocalyptic number.

It is an amenable number.

64671213 is a deficient number, since it is larger than the sum of its proper divisors (26847123).

64671213 is a wasteful number, since it uses less digits than its factorization.

64671213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044.

The product of its digits is 6048, while the sum is 30.

The square root of 64671213 is about 8041.8413936113. The cubic root of 64671213 is about 401.3935001724.

Adding to 64671213 its reverse (31217646), we get a palindrome (95888859).

The spelling of 64671213 in words is "sixty-four million, six hundred seventy-one thousand, two hundred thirteen".