86694121 has 2 divisors, whose sum is σ = 86694122. Its totient is φ = 86694120.

The previous prime is 86694119. The next prime is 86694191. The reversal of 86694121 is 12149668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 4247721 = 9080^2 + 2061^2 .

It is a cyclic number.

It is not a de Polignac number, because 86694121 - 2¹ = 86694119 is a prime.

Together with 86694119, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86694191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43347060 + 43347061.

It is an arithmetic number, because the mean of its divisors is an integer number (43347061).

Almost surely, 2^86694121 is an apocalyptic number.

It is an amenable number.

86694121 is a deficient number, since it is larger than the sum of its proper divisors (1).

86694121 is an equidigital number, since it uses as much as digits as its factorization.

86694121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 86694121 is about 9310.9677799894. The cubic root of 86694121 is about 442.5848556771.

The spelling of 86694121 in words is "eighty-six million, six hundred ninety-four thousand, one hundred twenty-one".