65478499 has 2 divisors, whose sum is σ = 65478500. Its totient is φ = 65478498.

The previous prime is 65478463. The next prime is 65478521. The reversal of 65478499 is 99487456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65478499 - 2¹⁷ = 65347427 is a prime.

It is not a weakly prime, because it can be changed into another prime (65478449) 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, 32739249 + 32739250.

It is an arithmetic number, because the mean of its divisors is an integer number (32739250).

Almost surely, 2^65478499 is an apocalyptic number.

65478499 is a deficient number, since it is larger than the sum of its proper divisors (1).

65478499 is an equidigital number, since it uses as much as digits as its factorization.

65478499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 65478499 is about 8091.8785828755. The cubic root of 65478499 is about 403.0567868798.

The spelling of 65478499 in words is "sixty-five million, four hundred seventy-eight thousand, four hundred ninety-nine".