64680953 has 2 divisors, whose sum is σ = 64680954. Its totient is φ = 64680952.

The previous prime is 64680949. The next prime is 64680983. The reversal of 64680953 is 35908646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51079609 + 13601344 = 7147^2 + 3688^2 .

It is a cyclic number.

It is not a de Polignac number, because 64680953 - 2² = 64680949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64680953.

It is not a weakly prime, because it can be changed into another prime (64680983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32340476 + 32340477.

It is an arithmetic number, because the mean of its divisors is an integer number (32340477).

Almost surely, 2^64680953 is an apocalyptic number.

It is an amenable number.

64680953 is a deficient number, since it is larger than the sum of its proper divisors (1).

64680953 is an equidigital number, since it uses as much as digits as its factorization.

64680953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 64680953 is about 8042.4469535086. The cubic root of 64680953 is about 401.4136501807.

The spelling of 64680953 in words is "sixty-four million, six hundred eighty thousand, nine hundred fifty-three".