64687039 has 8 divisors (see below), whose sum is σ = 68512640. Its totient is φ = 60903576.

The previous prime is 64687037. The next prime is 64687079. The reversal of 64687039 is 93078646.

It is a happy number.

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 64687039 - 2¹ = 64687037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64686986 and 64687004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64687037) 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, 7347 + ... + 13540.

It is an arithmetic number, because the mean of its divisors is an integer number (8564080).

Almost surely, 2^64687039 is an apocalyptic number.

64687039 is a deficient number, since it is larger than the sum of its proper divisors (3825601).

64687039 is a wasteful number, since it uses less digits than its factorization.

64687039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21069.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 64687039 is about 8042.8253120405. The cubic root of 64687039 is about 401.4262398059.

The spelling of 64687039 in words is "sixty-four million, six hundred eighty-seven thousand, thirty-nine".