77789039 has 2 divisors, whose sum is σ = 77789040. Its totient is φ = 77789038.

The previous prime is 77789029. The next prime is 77789069. The reversal of 77789039 is 93098777.

It is a weak prime.

It is an emirp because it is prime and its reverse (93098777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77789039 - 2²⁰ = 76740463 is a prime.

It is a super-2 number, since 2×77789039² = 12102269177087042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77789029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38894519 + 38894520.

It is an arithmetic number, because the mean of its divisors is an integer number (38894520).

Almost surely, 2^77789039 is an apocalyptic number.

77789039 is a deficient number, since it is larger than the sum of its proper divisors (1).

77789039 is an equidigital number, since it uses as much as digits as its factorization.

77789039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 77789039 is about 8819.8094650622. The cubic root of 77789039 is about 426.8803219348.

The spelling of 77789039 in words is "seventy-seven million, seven hundred eighty-nine thousand, thirty-nine".