77008069 has 2 divisors, whose sum is σ = 77008070. Its totient is φ = 77008068.

The previous prime is 77008067. The next prime is 77008081. The reversal of 77008069 is 96080077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72471169 + 4536900 = 8513^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 77008069 - 2¹ = 77008067 is a prime.

It is a super-2 number, since 2×77008069² = 11860485382217522, which contains 22 as substring.

Together with 77008067, 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 (77008067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38504034 + 38504035.

It is an arithmetic number, because the mean of its divisors is an integer number (38504035).

Almost surely, 2^77008069 is an apocalyptic number.

It is an amenable number.

77008069 is a deficient number, since it is larger than the sum of its proper divisors (1).

77008069 is an equidigital number, since it uses as much as digits as its factorization.

77008069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 77008069 is about 8775.4241492933. The cubic root of 77008069 is about 425.4469466483.

The spelling of 77008069 in words is "seventy-seven million, eight thousand, sixty-nine".