78367117 has 2 divisors, whose sum is σ = 78367118. Its totient is φ = 78367116.

The previous prime is 78367111. The next prime is 78367123. The reversal of 78367117 is 71176387.

It is a balanced prime because it is at equal distance from previous prime (78367111) and next prime (78367123).

It can be written as a sum of positive squares in only one way, i.e., 74753316 + 3613801 = 8646^2 + 1901^2 .

It is a cyclic number.

It is not a de Polignac number, because 78367117 - 2¹¹ = 78365069 is a prime.

It is a super-2 number, since 2×78367117² = 12282810053783378, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78367117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78367111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39183558 + 39183559.

It is an arithmetic number, because the mean of its divisors is an integer number (39183559).

Almost surely, 2^78367117 is an apocalyptic number.

It is an amenable number.

78367117 is a deficient number, since it is larger than the sum of its proper divisors (1).

78367117 is an equidigital number, since it uses as much as digits as its factorization.

78367117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 78367117 is about 8852.5203755767. The cubic root of 78367117 is about 427.9351464462.

The spelling of 78367117 in words is "seventy-eight million, three hundred sixty-seven thousand, one hundred seventeen".