64219349 has 4 divisors (see below), whose sum is σ = 64604064. Its totient is φ = 63834636.

The previous prime is 64219313. The next prime is 64219361. The reversal of 64219349 is 94391246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64219349 - 2¹⁶ = 64153813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64219549) 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, 192107 + ... + 192440.

It is an arithmetic number, because the mean of its divisors is an integer number (16151016).

Almost surely, 2^64219349 is an apocalyptic number.

It is an amenable number.

64219349 is a deficient number, since it is larger than the sum of its proper divisors (384715).

64219349 is a wasteful number, since it uses less digits than its factorization.

64219349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384714.

The product of its digits is 46656, while the sum is 38.

The square root of 64219349 is about 8013.6975860086. The cubic root of 64219349 is about 400.4564560050.

It can be divided in two parts, 642 and 19349, that added together give a palindrome (19991).

The spelling of 64219349 in words is "sixty-four million, two hundred nineteen thousand, three hundred forty-nine".