65278459 has 2 divisors, whose sum is σ = 65278460. Its totient is φ = 65278458.

The previous prime is 65278427. The next prime is 65278469. The reversal of 65278459 is 95487256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65278459 - 2⁵ = 65278427 is a prime.

It is a super-2 number, since 2×65278459² = 8522554418829362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65278469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32639229 + 32639230.

It is an arithmetic number, because the mean of its divisors is an integer number (32639230).

Almost surely, 2^65278459 is an apocalyptic number.

65278459 is a deficient number, since it is larger than the sum of its proper divisors (1).

65278459 is an equidigital number, since it uses as much as digits as its factorization.

65278459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 65278459 is about 8079.5085865416. The cubic root of 65278459 is about 402.6459154870.

The spelling of 65278459 in words is "sixty-five million, two hundred seventy-eight thousand, four hundred fifty-nine".