64240529 has 2 divisors, whose sum is σ = 64240530. Its totient is φ = 64240528.

The previous prime is 64240513. The next prime is 64240549. The reversal of 64240529 is 92504246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58369600 + 5870929 = 7640^2 + 2423^2 .

It is a cyclic number.

It is not a de Polignac number, because 64240529 - 2⁴ = 64240513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64240495 and 64240504.

It is not a weakly prime, because it can be changed into another prime (64240549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32120264 + 32120265.

It is an arithmetic number, because the mean of its divisors is an integer number (32120265).

Almost surely, 2^64240529 is an apocalyptic number.

It is an amenable number.

64240529 is a deficient number, since it is larger than the sum of its proper divisors (1).

64240529 is an equidigital number, since it uses as much as digits as its factorization.

64240529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 64240529 is about 8015.0189644192. The cubic root of 64240529 is about 400.5004756325.

The spelling of 64240529 in words is "sixty-four million, two hundred forty thousand, five hundred twenty-nine".