64402529 has 2 divisors, whose sum is σ = 64402530. Its totient is φ = 64402528.

The previous prime is 64402517. The next prime is 64402543. The reversal of 64402529 is 92520446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52998400 + 11404129 = 7280^2 + 3377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64402529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64402495 and 64402504.

It is not a weakly prime, because it can be changed into another prime (64422529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32201264 + 32201265.

It is an arithmetic number, because the mean of its divisors is an integer number (32201265).

Almost surely, 2^64402529 is an apocalyptic number.

It is an amenable number.

64402529 is a deficient number, since it is larger than the sum of its proper divisors (1).

64402529 is an equidigital number, since it uses as much as digits as its factorization.

64402529 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 64402529 is about 8025.1186284067. The cubic root of 64402529 is about 400.8368500673.

The spelling of 64402529 in words is "sixty-four million, four hundred two thousand, five hundred twenty-nine".