77654081 has 2 divisors, whose sum is σ = 77654082. Its totient is φ = 77654080.

The previous prime is 77654047. The next prime is 77654099. The reversal of 77654081 is 18045677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 26173456 = 7175^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 77654081 - 2²⁶ = 10545217 is a prime.

It is a super-2 number, since 2×77654081² = 12060312591909122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77654021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38827040 + 38827041.

It is an arithmetic number, because the mean of its divisors is an integer number (38827041).

Almost surely, 2^77654081 is an apocalyptic number.

It is an amenable number.

77654081 is a deficient number, since it is larger than the sum of its proper divisors (1).

77654081 is an equidigital number, since it uses as much as digits as its factorization.

77654081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 77654081 is about 8812.1552982230. The cubic root of 77654081 is about 426.6333108554.

The spelling of 77654081 in words is "seventy-seven million, six hundred fifty-four thousand, eighty-one".