167606391 has 16 divisors (see below), whose sum is σ = 235587200. Its totient is φ = 105699168.

The previous prime is 167606381. The next prime is 167606423. The reversal of 167606391 is 193606761.

It is not a de Polignac number, because 167606391 - 2¹⁰ = 167605367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167606381) 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 15 ways as a sum of consecutive naturals, for example, 45480 + ... + 49026.

It is an arithmetic number, because the mean of its divisors is an integer number (14724200).

Almost surely, 2^167606391 is an apocalyptic number.

167606391 is a deficient number, since it is larger than the sum of its proper divisors (67980809).

167606391 is a wasteful number, since it uses less digits than its factorization.

167606391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 167606391 is about 12946.2886959931. The cubic root of 167606391 is about 551.3535707617.

The spelling of 167606391 in words is "one hundred sixty-seven million, six hundred six thousand, three hundred ninety-one".