78330899 has 2 divisors, whose sum is σ = 78330900. Its totient is φ = 78330898.

The previous prime is 78330877. The next prime is 78330919. The reversal of 78330899 is 99803387.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78330899 is a prime.

It is a super-2 number, since 2×78330899² = 12271459476296402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78330829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39165449 + 39165450.

It is an arithmetic number, because the mean of its divisors is an integer number (39165450).

Almost surely, 2^78330899 is an apocalyptic number.

78330899 is a deficient number, since it is larger than the sum of its proper divisors (1).

78330899 is an equidigital number, since it uses as much as digits as its factorization.

78330899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 78330899 is about 8850.4745070533. The cubic root of 78330899 is about 427.8692117191.

The spelling of 78330899 in words is "seventy-eight million, three hundred thirty thousand, eight hundred ninety-nine".