64211389 has 4 divisors (see below), whose sum is σ = 70048800. Its totient is φ = 58373980.

The previous prime is 64211359. The next prime is 64211429. The reversal of 64211389 is 98311246.

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 64211389 - 2²⁵ = 30656957 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 (64211359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2918689 + ... + 2918710.

It is an arithmetic number, because the mean of its divisors is an integer number (17512200).

Almost surely, 2^64211389 is an apocalyptic number.

It is an amenable number.

64211389 is a deficient number, since it is larger than the sum of its proper divisors (5837411).

64211389 is a wasteful number, since it uses less digits than its factorization.

64211389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837410.

The product of its digits is 10368, while the sum is 34.

The square root of 64211389 is about 8013.2009209803. The cubic root of 64211389 is about 400.4399097711.

The spelling of 64211389 in words is "sixty-four million, two hundred eleven thousand, three hundred eighty-nine".