167149981 has 2 divisors, whose sum is σ = 167149982. Its totient is φ = 167149980.

The previous prime is 167149963. The next prime is 167149999. The reversal of 167149981 is 189941761.

It is a balanced prime because it is at equal distance from previous prime (167149963) and next prime (167149999).

It can be written as a sum of positive squares in only one way, i.e., 162154756 + 4995225 = 12734^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 167149981 - 2⁵ = 167149949 is a prime.

It is a super-2 number, since 2×167149981² = 55878232296600722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167149481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83574990 + 83574991.

It is an arithmetic number, because the mean of its divisors is an integer number (83574991).

Almost surely, 2^167149981 is an apocalyptic number.

It is an amenable number.

167149981 is a deficient number, since it is larger than the sum of its proper divisors (1).

167149981 is an equidigital number, since it uses as much as digits as its factorization.

167149981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 167149981 is about 12928.6496201266. The cubic root of 167149981 is about 550.8526510274.

The spelling of 167149981 in words is "one hundred sixty-seven million, one hundred forty-nine thousand, nine hundred eighty-one".