64280257 has 2 divisors, whose sum is σ = 64280258. Its totient is φ = 64280256.

The previous prime is 64280233. The next prime is 64280261. The reversal of 64280257 is 75208246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48566961 + 15713296 = 6969^2 + 3964^2 .

It is a cyclic number.

It is not a de Polignac number, because 64280257 - 2¹¹ = 64278209 is a prime.

It is not a weakly prime, because it can be changed into another prime (64280207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32140128 + 32140129.

It is an arithmetic number, because the mean of its divisors is an integer number (32140129).

Almost surely, 2^64280257 is an apocalyptic number.

It is an amenable number.

64280257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64280257 is an equidigital number, since it uses as much as digits as its factorization.

64280257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 64280257 is about 8017.4969285931. The cubic root of 64280257 is about 400.5830185605.

The spelling of 64280257 in words is "sixty-four million, two hundred eighty thousand, two hundred fifty-seven".