167689045 has 4 divisors (see below), whose sum is σ = 201226860. Its totient is φ = 134151232.

The previous prime is 167689019. The next prime is 167689051. The reversal of 167689045 is 540986761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540986761 = 7 ⋅77283823.

It can be written as a sum of positive squares in 2 ways, for example, as 52620516 + 115068529 = 7254^2 + 10727^2 .

It is a cyclic number.

It is not a de Polignac number, because 167689045 - 2⁹ = 167688533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 167688986 and 167689004.

It is a congruent number.

It is an unprimeable number.

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, 16768900 + ... + 16768909.

It is an arithmetic number, because the mean of its divisors is an integer number (50306715).

Almost surely, 2^167689045 is an apocalyptic number.

It is an amenable number.

167689045 is a deficient number, since it is larger than the sum of its proper divisors (33537815).

167689045 is an equidigital number, since it uses as much as digits as its factorization.

167689045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33537814.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 167689045 is about 12949.4804915101. The cubic root of 167689045 is about 551.4441880083. Note that the first 3 decimals are identical.

The spelling of 167689045 in words is "one hundred sixty-seven million, six hundred eighty-nine thousand, forty-five".