117822779 has 2 divisors, whose sum is σ = 117822780. Its totient is φ = 117822778.

The previous prime is 117822773. The next prime is 117822797. The reversal of 117822779 is 977228711.

It is a happy number.

Together with next prime (117822797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117822779 - 2¹² = 117818683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (117822773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58911389 + 58911390.

It is an arithmetic number, because the mean of its divisors is an integer number (58911390).

Almost surely, 2^117822779 is an apocalyptic number.

117822779 is a deficient number, since it is larger than the sum of its proper divisors (1).

117822779 is an equidigital number, since it uses as much as digits as its factorization.

117822779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 44.

The square root of 117822779 is about 10854.6201683891. The cubic root of 117822779 is about 490.2411405072.

The spelling of 117822779 in words is "one hundred seventeen million, eight hundred twenty-two thousand, seven hundred seventy-nine".