77822117 has 2 divisors, whose sum is σ = 77822118. Its totient is φ = 77822116.

The previous prime is 77822099. The next prime is 77822123. The reversal of 77822117 is 71122877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74632321 + 3189796 = 8639^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 77822117 - 2⁶ = 77822053 is a prime.

It is a Chen prime.

It is equal to p_4549751 and since 77822117 and 4549751 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77822197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38911058 + 38911059.

It is an arithmetic number, because the mean of its divisors is an integer number (38911059).

Almost surely, 2^77822117 is an apocalyptic number.

It is an amenable number.

77822117 is a deficient number, since it is larger than the sum of its proper divisors (1).

77822117 is an equidigital number, since it uses as much as digits as its factorization.

77822117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10976, while the sum is 35.

The square root of 77822117 is about 8821.6844763344. The cubic root of 77822117 is about 426.9408203739.

The spelling of 77822117 in words is "seventy-seven million, eight hundred twenty-two thousand, one hundred seventeen".