77026109 has 2 divisors, whose sum is σ = 77026110. Its totient is φ = 77026108.

The previous prime is 77026087. The next prime is 77026121. The reversal of 77026109 is 90162077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49042009 + 27984100 = 7003^2 + 5290^2 .

It is an emirp because it is prime and its reverse (90162077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77026109 - 2⁸ = 77025853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77026129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38513054 + 38513055.

It is an arithmetic number, because the mean of its divisors is an integer number (38513055).

Almost surely, 2^77026109 is an apocalyptic number.

It is an amenable number.

77026109 is a deficient number, since it is larger than the sum of its proper divisors (1).

77026109 is an equidigital number, since it uses as much as digits as its factorization.

77026109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 77026109 is about 8776.4519596475. The cubic root of 77026109 is about 425.4801659536.

The spelling of 77026109 in words is "seventy-seven million, twenty-six thousand, one hundred nine".