78546841 has 2 divisors, whose sum is σ = 78546842. Its totient is φ = 78546840.

The previous prime is 78546827. The next prime is 78546859. The reversal of 78546841 is 14864587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77369616 + 1177225 = 8796^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 78546841 - 2⁹ = 78546329 is a prime.

It is not a weakly prime, because it can be changed into another prime (78546821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39273420 + 39273421.

It is an arithmetic number, because the mean of its divisors is an integer number (39273421).

Almost surely, 2^78546841 is an apocalyptic number.

It is an amenable number.

78546841 is a deficient number, since it is larger than the sum of its proper divisors (1).

78546841 is an equidigital number, since it uses as much as digits as its factorization.

78546841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 43.

The square root of 78546841 is about 8862.6655696805. The cubic root of 78546841 is about 428.2620331121.

The spelling of 78546841 in words is "seventy-eight million, five hundred forty-six thousand, eight hundred forty-one".