64239911 has 8 divisors (see below), whose sum is σ = 65349504. Its totient is φ = 63139960.

The previous prime is 64239883. The next prime is 64239919. The reversal of 64239911 is 11993246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64239911 - 2¹⁰ = 64238887 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 (64239919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11726 + ... + 16308.

It is an arithmetic number, because the mean of its divisors is an integer number (8168688).

Almost surely, 2^64239911 is an apocalyptic number.

64239911 is a deficient number, since it is larger than the sum of its proper divisors (1109593).

64239911 is a wasteful number, since it uses less digits than its factorization.

64239911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821.

The product of its digits is 11664, while the sum is 35.

The square root of 64239911 is about 8014.9804117041. The cubic root of 64239911 is about 400.4991913442.

The spelling of 64239911 in words is "sixty-four million, two hundred thirty-nine thousand, nine hundred eleven".