78412799 has 2 divisors, whose sum is σ = 78412800. Its totient is φ = 78412798.

The previous prime is 78412777. The next prime is 78412813. The reversal of 78412799 is 99721487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78412799 - 2¹⁶ = 78347263 is a prime.

It is a super-2 number, since 2×78412799² = 12297134094028802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78412759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39206399 + 39206400.

It is an arithmetic number, because the mean of its divisors is an integer number (39206400).

Almost surely, 2^78412799 is an apocalyptic number.

78412799 is a deficient number, since it is larger than the sum of its proper divisors (1).

78412799 is an equidigital number, since it uses as much as digits as its factorization.

78412799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 78412799 is about 8855.1001688293. The cubic root of 78412799 is about 428.0182813835.

The spelling of 78412799 in words is "seventy-eight million, four hundred twelve thousand, seven hundred ninety-nine".