64997959 has 8 divisors (see below), whose sum is σ = 70957712. Its totient is φ = 59175360.

The previous prime is 64997957. The next prime is 64997963. The reversal of 64997959 is 95979946.

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 64997959 - 2¹ = 64997957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64997951) 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, 33297 + ... + 35194.

It is an arithmetic number, because the mean of its divisors is an integer number (8869714).

Almost surely, 2^64997959 is an apocalyptic number.

64997959 is a deficient number, since it is larger than the sum of its proper divisors (5959753).

64997959 is a wasteful number, since it uses less digits than its factorization.

64997959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68577.

The product of its digits is 5511240, while the sum is 58.

The square root of 64997959 is about 8062.1311698583. The cubic root of 64997959 is about 402.0683674552.

It can be divided in two parts, 64997 and 959, that added together give a palindrome (65956).

The spelling of 64997959 in words is "sixty-four million, nine hundred ninety-seven thousand, nine hundred fifty-nine".