77081113 has 2 divisors, whose sum is σ = 77081114. Its totient is φ = 77081112.

The previous prime is 77081099. The next prime is 77081131. The reversal of 77081113 is 31118077.

Together with next prime (77081131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74011609 + 3069504 = 8603^2 + 1752^2 .

It is an emirp because it is prime and its reverse (31118077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77081113 - 2¹³ = 77072921 is a prime.

It is not a weakly prime, because it can be changed into another prime (77081513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38540556 + 38540557.

It is an arithmetic number, because the mean of its divisors is an integer number (38540557).

Almost surely, 2^77081113 is an apocalyptic number.

It is an amenable number.

77081113 is a deficient number, since it is larger than the sum of its proper divisors (1).

77081113 is an equidigital number, since it uses as much as digits as its factorization.

77081113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 77081113 is about 8779.5850129719. The cubic root of 77081113 is about 425.5814196838.

The spelling of 77081113 in words is "seventy-seven million, eighty-one thousand, one hundred thirteen".