67085531 has 2 divisors, whose sum is σ = 67085532. Its totient is φ = 67085530.

The previous prime is 67085527. The next prime is 67085533. The reversal of 67085531 is 13558076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67085531 - 2² = 67085527 is a prime.

It is a super-2 number, since 2×67085531² = 9000936939103922, which contains 22 as substring.

Together with 67085533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 67085491 and 67085500.

It is not a weakly prime, because it can be changed into another prime (67085533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33542765 + 33542766.

It is an arithmetic number, because the mean of its divisors is an integer number (33542766).

Almost surely, 2^67085531 is an apocalyptic number.

67085531 is a deficient number, since it is larger than the sum of its proper divisors (1).

67085531 is an equidigital number, since it uses as much as digits as its factorization.

67085531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 67085531 is about 8190.5757428889. The cubic root of 67085531 is about 406.3275665382.

The spelling of 67085531 in words is "sixty-seven million, eighty-five thousand, five hundred thirty-one".