64869727 has 4 divisors (see below), whose sum is σ = 69859720. Its totient is φ = 59879736.

The previous prime is 64869719. The next prime is 64869787. The reversal of 64869727 is 72796846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72796846 = 2 ⋅36398423.

It is a cyclic number.

It is not a de Polignac number, because 64869727 - 2³ = 64869719 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 (64869787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2494977 + ... + 2495002.

It is an arithmetic number, because the mean of its divisors is an integer number (17464930).

Almost surely, 2^64869727 is an apocalyptic number.

64869727 is a deficient number, since it is larger than the sum of its proper divisors (4989993).

64869727 is a wasteful number, since it uses less digits than its factorization.

64869727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989992.

The product of its digits is 1016064, while the sum is 49.

The square root of 64869727 is about 8054.1745076699. The cubic root of 64869727 is about 401.8037849231.

The spelling of 64869727 in words is "sixty-four million, eight hundred sixty-nine thousand, seven hundred twenty-seven".