167473981 has 4 divisors (see below), whose sum is σ = 167507964. Its totient is φ = 167440000.

The previous prime is 167473979. The next prime is 167473991. The reversal of 167473981 is 189374761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48860100 + 118613881 = 6990^2 + 10891^2 .

It is a cyclic number.

It is not a de Polignac number, because 167473981 - 2¹ = 167473979 is a prime.

It is a super-2 number, since 2×167473981² = 56095068623976722, 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 (167473931) 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 in 3 ways as a sum of consecutive naturals, for example, 8020 + ... + 19981.

It is an arithmetic number, because the mean of its divisors is an integer number (41876991).

Almost surely, 2^167473981 is an apocalyptic number.

It is an amenable number.

167473981 is a deficient number, since it is larger than the sum of its proper divisors (33983).

167473981 is an equidigital number, since it uses as much as digits as its factorization.

167473981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33982.

The product of its digits is 254016, while the sum is 46.

The square root of 167473981 is about 12941.1738648393. The cubic root of 167473981 is about 551.2083416945.

The spelling of 167473981 in words is "one hundred sixty-seven million, four hundred seventy-three thousand, nine hundred eighty-one".