78001841 has 2 divisors, whose sum is σ = 78001842. Its totient is φ = 78001840.

The previous prime is 78001837. The next prime is 78001853. The reversal of 78001841 is 14810087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 37945600 = 6329^2 + 6160^2 .

It is a cyclic number.

It is not a de Polignac number, because 78001841 - 2² = 78001837 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78001141) 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, 39000920 + 39000921.

It is an arithmetic number, because the mean of its divisors is an integer number (39000921).

Almost surely, 2^78001841 is an apocalyptic number.

It is an amenable number.

78001841 is a deficient number, since it is larger than the sum of its proper divisors (1).

78001841 is an equidigital number, since it uses as much as digits as its factorization.

78001841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 78001841 is about 8831.8650918138. The cubic root of 78001841 is about 427.2692296667.

The spelling of 78001841 in words is "seventy-eight million, one thousand, eight hundred forty-one".