78068761 has 2 divisors, whose sum is σ = 78068762. Its totient is φ = 78068760.

The previous prime is 78068729. The next prime is 78068791. The reversal of 78068761 is 16786087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65108761 + 12960000 = 8069^2 + 3600^2 .

It is a cyclic number.

It is not a de Polignac number, because 78068761 - 2⁵ = 78068729 is a prime.

It is a pancake number, because a pancake can be divided into 78068761 parts by 12495 straight cuts.

It is not a weakly prime, because it can be changed into another prime (78068791) 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, 39034380 + 39034381.

It is an arithmetic number, because the mean of its divisors is an integer number (39034381).

Almost surely, 2^78068761 is an apocalyptic number.

It is an amenable number.

78068761 is a deficient number, since it is larger than the sum of its proper divisors (1).

78068761 is an equidigital number, since it uses as much as digits as its factorization.

78068761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 78068761 is about 8835.6528338318. The cubic root of 78068761 is about 427.3913835522.

The spelling of 78068761 in words is "seventy-eight million, sixty-eight thousand, seven hundred sixty-one".