64281289 has 4 divisors (see below), whose sum is σ = 65649024. Its totient is φ = 62913556.

The previous prime is 64281277. The next prime is 64281299. The reversal of 64281289 is 98218246.

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 64281289 - 2¹⁵ = 64248521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64281299) 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, 683797 + ... + 683890.

It is an arithmetic number, because the mean of its divisors is an integer number (16412256).

Almost surely, 2^64281289 is an apocalyptic number.

It is an amenable number.

64281289 is a deficient number, since it is larger than the sum of its proper divisors (1367735).

64281289 is a wasteful number, since it uses less digits than its factorization.

64281289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367734.

The product of its digits is 55296, while the sum is 40.

The square root of 64281289 is about 8017.5612875737. The cubic root of 64281289 is about 400.5851622953.

The spelling of 64281289 in words is "sixty-four million, two hundred eighty-one thousand, two hundred eighty-nine".