64869841 has 8 divisors (see below), whose sum is σ = 68804424. Its totient is φ = 60948480.

The previous prime is 64869811. The next prime is 64869853. The reversal of 64869841 is 14896846.

It can be written as a sum of positive squares in 4 ways, for example, as 11155600 + 53714241 = 3340^2 + 7329^2 .

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 64869841 - 2¹¹ = 64867793 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 64869791 and 64869800.

It is not an unprimeable number, because it can be changed into a prime (64869811) 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 7 ways as a sum of consecutive naturals, for example, 7921 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (8600553).

Almost surely, 2^64869841 is an apocalyptic number.

It is an amenable number.

64869841 is a deficient number, since it is larger than the sum of its proper divisors (3934583).

64869841 is a wasteful number, since it uses less digits than its factorization.

64869841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6611.

The product of its digits is 331776, while the sum is 46.

The square root of 64869841 is about 8054.1815847422. The cubic root of 64869841 is about 401.8040202953.

The spelling of 64869841 in words is "sixty-four million, eight hundred sixty-nine thousand, eight hundred forty-one".