167491 has 2 divisors, whose sum is σ = 167492. Its totient is φ = 167490.

The previous prime is 167483. The next prime is 167521. The reversal of 167491 is 194761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 167491 - 2³ = 167483 is a prime.

167491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (167441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83745 + 83746.

It is an arithmetic number, because the mean of its divisors is an integer number (83746).

2¹⁶⁷⁴⁹¹ is an apocalyptic number.

167491 is a deficient number, since it is larger than the sum of its proper divisors (1).

167491 is an equidigital number, since it uses as much as digits as its factorization.

167491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 167491 is about 409.2566431959. The cubic root of 167491 is about 55.1227012649.

The spelling of 167491 in words is "one hundred sixty-seven thousand, four hundred ninety-one".