77006869 has 2 divisors, whose sum is σ = 77006870. Its totient is φ = 77006868.

The previous prime is 77006863. The next prime is 77006887. The reversal of 77006869 is 96860077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40259025 + 36747844 = 6345^2 + 6062^2 .

It is an emirp because it is prime and its reverse (96860077) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77006869 is a prime.

It is a super-2 number, since 2×77006869² = 11860115746366322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77006863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38503434 + 38503435.

It is an arithmetic number, because the mean of its divisors is an integer number (38503435).

Almost surely, 2^77006869 is an apocalyptic number.

It is an amenable number.

77006869 is a deficient number, since it is larger than the sum of its proper divisors (1).

77006869 is an equidigital number, since it uses as much as digits as its factorization.

77006869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 77006869 is about 8775.3557762634. The cubic root of 77006869 is about 425.4447367544. Note that the first 3 decimals are identical.

The spelling of 77006869 in words is "seventy-seven million, six thousand, eight hundred sixty-nine".