64083881 has 4 divisors (see below), whose sum is σ = 66293700. Its totient is φ = 61874064.

The previous prime is 64083869. The next prime is 64083883. The reversal of 64083881 is 18838046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18838046 = 2 ⋅9419023.

It can be written as a sum of positive squares in 2 ways, for example, as 16128256 + 47955625 = 4016^2 + 6925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64083881 is a prime.

It is a super-3 number, since 3×64083881³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64083883) 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, 1104866 + ... + 1104923.

It is an arithmetic number, because the mean of its divisors is an integer number (16573425).

Almost surely, 2^64083881 is an apocalyptic number.

It is an amenable number.

64083881 is a deficient number, since it is larger than the sum of its proper divisors (2209819).

64083881 is a wasteful number, since it uses less digits than its factorization.

64083881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209818.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 64083881 is about 8005.2408458459. The cubic root of 64083881 is about 400.1746757931.

The spelling of 64083881 in words is "sixty-four million, eighty-three thousand, eight hundred eighty-one".