78776041 has 4 divisors (see below), whose sum is σ = 78835284. Its totient is φ = 78716800.

The previous prime is 78776039. The next prime is 78776051. The reversal of 78776041 is 14067787.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6780816 + 71995225 = 2604^2 + 8485^2 .

It is a cyclic number.

It is not a de Polignac number, because 78776041 - 2¹ = 78776039 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78775985 and 78776003.

It is not an unprimeable number, because it can be changed into a prime (78776021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27580 + ... + 30301.

It is an arithmetic number, because the mean of its divisors is an integer number (19708821).

Almost surely, 2^78776041 is an apocalyptic number.

It is an amenable number.

78776041 is a deficient number, since it is larger than the sum of its proper divisors (59243).

78776041 is a wasteful number, since it uses less digits than its factorization.

78776041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59242.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 78776041 is about 8875.5867975025. The cubic root of 78776041 is about 428.6781853783.

The spelling of 78776041 in words is "seventy-eight million, seven hundred seventy-six thousand, forty-one".