64807069 has 4 divisors (see below), whose sum is σ = 65076220. Its totient is φ = 64537920.

The previous prime is 64807049. The next prime is 64807073. The reversal of 64807069 is 96070846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18062500 + 46744569 = 4250^2 + 6837^2 .

It is a cyclic number.

It is not a de Polignac number, because 64807069 - 2⁹ = 64806557 is a prime.

It is a super-2 number, since 2×64807069² = 8399912384741522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64807049) 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, 134214 + ... + 134695.

It is an arithmetic number, because the mean of its divisors is an integer number (16269055).

Almost surely, 2^64807069 is an apocalyptic number.

It is an amenable number.

64807069 is a deficient number, since it is larger than the sum of its proper divisors (269151).

64807069 is a wasteful number, since it uses less digits than its factorization.

64807069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269150.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 64807069 is about 8050.2837838178. The cubic root of 64807069 is about 401.6743751402.

The spelling of 64807069 in words is "sixty-four million, eight hundred seven thousand, sixty-nine".