64256429 has 2 divisors, whose sum is σ = 64256430. Its totient is φ = 64256428.

The previous prime is 64256371. The next prime is 64256449. The reversal of 64256429 is 92465246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61936900 + 2319529 = 7870^2 + 1523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64256429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64256392 and 64256401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64256449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32128214 + 32128215.

It is an arithmetic number, because the mean of its divisors is an integer number (32128215).

Almost surely, 2^64256429 is an apocalyptic number.

It is an amenable number.

64256429 is a deficient number, since it is larger than the sum of its proper divisors (1).

64256429 is an equidigital number, since it uses as much as digits as its factorization.

64256429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 64256429 is about 8016.0107909109. The cubic root of 64256429 is about 400.5335151709.

The spelling of 64256429 in words is "sixty-four million, two hundred fifty-six thousand, four hundred twenty-nine".