167945381 has 6 divisors (see below), whose sum is σ = 169541190. Its totient is φ = 166364456.

The previous prime is 167945369. The next prime is 167945411. The reversal of 167945381 is 183549761.

167945381 = T₁₇₁₈ + T₁₇₁₉ + ... + T₁₈₂₄.

It can be written as a sum of positive squares in only one way, i.e., 151413025 + 16532356 = 12305^2 + 4066^2 .

It is not a de Polignac number, because 167945381 - 2¹⁸ = 167683237 is a prime.

It is a super-2 number, since 2×167945381² = 56411301998470322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167915381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4115 + ... + 18783.

It is an arithmetic number, because the mean of its divisors is an integer number (28256865).

Almost surely, 2^167945381 is an apocalyptic number.

It is an amenable number.

167945381 is a deficient number, since it is larger than the sum of its proper divisors (1595809).

167945381 is an equidigital number, since it uses as much as digits as its factorization.

167945381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14883 (or 14776 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 167945381 is about 12959.3742518688. The cubic root of 167945381 is about 551.7250313028.

The spelling of 167945381 in words is "one hundred sixty-seven million, nine hundred forty-five thousand, three hundred eighty-one".