78981041 has 2 divisors, whose sum is σ = 78981042. Its totient is φ = 78981040.

The previous prime is 78981037. The next prime is 78981059. The reversal of 78981041 is 14018987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78836641 + 144400 = 8879^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 78981041 - 2² = 78981037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78980986 and 78981004.

It is not a weakly prime, because it can be changed into another prime (78981061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39490520 + 39490521.

It is an arithmetic number, because the mean of its divisors is an integer number (39490521).

Almost surely, 2^78981041 is an apocalyptic number.

It is an amenable number.

78981041 is a deficient number, since it is larger than the sum of its proper divisors (1).

78981041 is an equidigital number, since it uses as much as digits as its factorization.

78981041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 78981041 is about 8887.1278262440. The cubic root of 78981041 is about 429.0497150435.

The spelling of 78981041 in words is "seventy-eight million, nine hundred eighty-one thousand, forty-one".