77067769 has 2 divisors, whose sum is σ = 77067770. Its totient is φ = 77067768.

The previous prime is 77067763. The next prime is 77067773. The reversal of 77067769 is 96776077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62726400 + 14341369 = 7920^2 + 3787^2 .

It is an emirp because it is prime and its reverse (96776077) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77067769 is a prime.

It is a super-2 number, since 2×77067769² = 11878882037274722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77067763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38533884 + 38533885.

It is an arithmetic number, because the mean of its divisors is an integer number (38533885).

Almost surely, 2^77067769 is an apocalyptic number.

It is an amenable number.

77067769 is a deficient number, since it is larger than the sum of its proper divisors (1).

77067769 is an equidigital number, since it uses as much as digits as its factorization.

77067769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777924, while the sum is 49.

The square root of 77067769 is about 8778.8250352766. The cubic root of 77067769 is about 425.5568599009.

The spelling of 77067769 in words is "seventy-seven million, sixty-seven thousand, seven hundred sixty-nine".