64340657 has 2 divisors, whose sum is σ = 64340658. Its totient is φ = 64340656.

The previous prime is 64340651. The next prime is 64340663. The reversal of 64340657 is 75604346.

It is a balanced prime because it is at equal distance from previous prime (64340651) and next prime (64340663).

It can be written as a sum of positive squares in only one way, i.e., 62078641 + 2262016 = 7879^2 + 1504^2 .

It is a cyclic number.

It is not a de Polignac number, because 64340657 - 2⁸ = 64340401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64340651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32170328 + 32170329.

It is an arithmetic number, because the mean of its divisors is an integer number (32170329).

Almost surely, 2^64340657 is an apocalyptic number.

It is an amenable number.

64340657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64340657 is an equidigital number, since it uses as much as digits as its factorization.

64340657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 64340657 is about 8021.2628058180. The cubic root of 64340657 is about 400.7084466011.

The spelling of 64340657 in words is "sixty-four million, three hundred forty thousand, six hundred fifty-seven".