64452139 has 2 divisors, whose sum is σ = 64452140. Its totient is φ = 64452138.

The previous prime is 64452133. The next prime is 64452163. The reversal of 64452139 is 93125446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64452139 is a prime.

It is not a weakly prime, because it can be changed into another prime (64452133) 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 as a sum of consecutive naturals, namely, 32226069 + 32226070.

It is an arithmetic number, because the mean of its divisors is an integer number (32226070).

Almost surely, 2^64452139 is an apocalyptic number.

64452139 is a deficient number, since it is larger than the sum of its proper divisors (1).

64452139 is an equidigital number, since it uses as much as digits as its factorization.

64452139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 64452139 is about 8028.2089534341. The cubic root of 64452139 is about 400.9397467113.

The spelling of 64452139 in words is "sixty-four million, four hundred fifty-two thousand, one hundred thirty-nine".