64840873 has 8 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 60951360.

The previous prime is 64840849. The next prime is 64840877. The reversal of 64840873 is 37804846.

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 64840873 - 2²⁵ = 31286441 is a prime.

It is a super-2 number, since 2×64840873² = 8408677622804258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64840877) 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, 15828 + ... + 19498.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^64840873 is an apocalyptic number.

It is an amenable number.

64840873 is a deficient number, since it is larger than the sum of its proper divisors (3898967).

64840873 is a wasteful number, since it uses less digits than its factorization.

64840873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 64840873 is about 8052.3830634167. The cubic root of 64840873 is about 401.7442020929.

The spelling of 64840873 in words is "sixty-four million, eight hundred forty thousand, eight hundred seventy-three".