167861731 has 4 divisors (see below), whose sum is σ = 168931072. Its totient is φ = 166792392.

The previous prime is 167861699. The next prime is 167861777. The reversal of 167861731 is 137168761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137168761 = 109 ⋅1258429.

It is a cyclic number.

It is not a de Polignac number, because 167861731 - 2⁵ = 167861699 is a prime.

It is a super-2 number, since 2×167861731² = 56355121468632722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167861131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534435 + ... + 534748.

It is an arithmetic number, because the mean of its divisors is an integer number (42232768).

Almost surely, 2^167861731 is an apocalyptic number.

167861731 is a deficient number, since it is larger than the sum of its proper divisors (1069341).

167861731 is a wasteful number, since it uses less digits than its factorization.

167861731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069340.

The product of its digits is 42336, while the sum is 40.

The square root of 167861731 is about 12956.1464564121. The cubic root of 167861731 is about 551.6334152804.

The spelling of 167861731 in words is "one hundred sixty-seven million, eight hundred sixty-one thousand, seven hundred thirty-one".