64688137 has 8 divisors (see below), whose sum is σ = 65581920. Its totient is φ = 63798240.

The previous prime is 64688101. The next prime is 64688159. The reversal of 64688137 is 73188646.

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 64688137 - 2¹⁹ = 64163849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64688093 and 64688102.

It is not an unprimeable number, because it can be changed into a prime (64688737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49462 + ... + 50752.

It is an arithmetic number, because the mean of its divisors is an integer number (8197740).

Almost surely, 2^64688137 is an apocalyptic number.

It is an amenable number.

64688137 is a deficient number, since it is larger than the sum of its proper divisors (893783).

64688137 is a wasteful number, since it uses less digits than its factorization.

64688137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its digits is 193536, while the sum is 43.

The square root of 64688137 is about 8042.8935713461. The cubic root of 64688137 is about 401.4285110672.

The spelling of 64688137 in words is "sixty-four million, six hundred eighty-eight thousand, one hundred thirty-seven".