167669993 has 2 divisors, whose sum is σ = 167669994. Its totient is φ = 167669992.

The previous prime is 167669989. The next prime is 167670017. The reversal of 167669993 is 399966761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112954384 + 54715609 = 10628^2 + 7397^2 .

It is an emirp because it is prime and its reverse (399966761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167669993 - 2² = 167669989 is a prime.

It is a super-2 number, since 2×167669993² = 56226453105240098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (167669693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83834996 + 83834997.

It is an arithmetic number, because the mean of its divisors is an integer number (83834997).

Almost surely, 2^167669993 is an apocalyptic number.

It is an amenable number.

167669993 is a deficient number, since it is larger than the sum of its proper divisors (1).

167669993 is an equidigital number, since it uses as much as digits as its factorization.

167669993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 56.

The square root of 167669993 is about 12948.7448426479. The cubic root of 167669993 is about 551.4233030968.

The spelling of 167669993 in words is "one hundred sixty-seven million, six hundred sixty-nine thousand, nine hundred ninety-three".