64840953 has 8 divisors (see below), whose sum is σ = 86510368. Its totient is φ = 43199424.

The previous prime is 64840949. The next prime is 64840957. The reversal of 64840953 is 35904846.

It is an interprime number because it is at equal distance from previous prime (64840949) and next prime (64840957).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64840953 - 2² = 64840949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64840957) 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, 751 + ... + 11412.

It is an arithmetic number, because the mean of its divisors is an integer number (10813796).

Almost surely, 2^64840953 is an apocalyptic number.

It is an amenable number.

64840953 is a deficient number, since it is larger than the sum of its proper divisors (21669415).

64840953 is a wasteful number, since it uses less digits than its factorization.

64840953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13943.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 64840953 is about 8052.3880308887. The cubic root of 64840953 is about 401.7443673154.

The spelling of 64840953 in words is "sixty-four million, eight hundred forty thousand, nine hundred fifty-three".