77113789 has 2 divisors, whose sum is σ = 77113790. Its totient is φ = 77113788.

The previous prime is 77113787. The next prime is 77113801. The reversal of 77113789 is 98731177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 2377764 = 8645^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 77113789 - 2¹ = 77113787 is a prime.

Together with 77113787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77113787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38556894 + 38556895.

It is an arithmetic number, because the mean of its divisors is an integer number (38556895).

Almost surely, 2^77113789 is an apocalyptic number.

It is an amenable number.

77113789 is a deficient number, since it is larger than the sum of its proper divisors (1).

77113789 is an equidigital number, since it uses as much as digits as its factorization.

77113789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 43.

The square root of 77113789 is about 8781.4457237974. The cubic root of 77113789 is about 425.6415482651.

The spelling of 77113789 in words is "seventy-seven million, one hundred thirteen thousand, seven hundred eighty-nine".