86111381 has 2 divisors, whose sum is σ = 86111382. Its totient is φ = 86111380.

The previous prime is 86111371. The next prime is 86111393. The reversal of 86111381 is 18311168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73444900 + 12666481 = 8570^2 + 3559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86111381 is a prime.

It is a super-2 number, since 2×86111381² = 14830339875454322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86111371) 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, 43055690 + 43055691.

It is an arithmetic number, because the mean of its divisors is an integer number (43055691).

Almost surely, 2^86111381 is an apocalyptic number.

It is an amenable number.

86111381 is a deficient number, since it is larger than the sum of its proper divisors (1).

86111381 is an equidigital number, since it uses as much as digits as its factorization.

86111381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 29.

The square root of 86111381 is about 9279.6218134146. The cubic root of 86111381 is about 441.5909707385.

The spelling of 86111381 in words is "eighty-six million, one hundred eleven thousand, three hundred eighty-one".