78615041 has 2 divisors, whose sum is σ = 78615042. Its totient is φ = 78615040.

The previous prime is 78615037. The next prime is 78615071. The reversal of 78615041 is 14051687.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 8976016 = 8345^2 + 2996^2 .

It is a cyclic number.

It is not a de Polignac number, because 78615041 - 2² = 78615037 is a prime.

It is a Chen prime.

It is equal to p_4593308 and since 78615041 and 4593308 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 78614989 and 78615007.

It is not a weakly prime, because it can be changed into another prime (78615001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39307520 + 39307521.

It is an arithmetic number, because the mean of its divisors is an integer number (39307521).

Almost surely, 2^78615041 is an apocalyptic number.

It is an amenable number.

78615041 is a deficient number, since it is larger than the sum of its proper divisors (1).

78615041 is an equidigital number, since it uses as much as digits as its factorization.

78615041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 78615041 is about 8866.5123357496. The cubic root of 78615041 is about 428.3859465249.

The spelling of 78615041 in words is "seventy-eight million, six hundred fifteen thousand, forty-one".