167881481 has 2 divisors, whose sum is σ = 167881482. Its totient is φ = 167881480.

The previous prime is 167881463. The next prime is 167881541. The reversal of 167881481 is 184188761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137851081 + 30030400 = 11741^2 + 5480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167881481 is a prime.

It is a super-2 number, since 2×167881481² = 56368383325506722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (167881421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83940740 + 83940741.

It is an arithmetic number, because the mean of its divisors is an integer number (83940741).

Almost surely, 2^167881481 is an apocalyptic number.

It is an amenable number.

167881481 is a deficient number, since it is larger than the sum of its proper divisors (1).

167881481 is an equidigital number, since it uses as much as digits as its factorization.

167881481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 44.

The square root of 167881481 is about 12956.9086205005. The cubic root of 167881481 is about 551.6550488249.

The spelling of 167881481 in words is "one hundred sixty-seven million, eight hundred eighty-one thousand, four hundred eighty-one".