158669173 has 4 divisors (see below), whose sum is σ = 170874508. Its totient is φ = 146463840.

The previous prime is 158669117. The next prime is 158669207. The reversal of 158669173 is 371966851.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371966851 = 17 ⋅21880403.

It can be written as a sum of positive squares in 2 ways, for example, as 36942084 + 121727089 = 6078^2 + 11033^2 .

It is a cyclic number.

It is not a de Polignac number, because 158669173 - 2¹³ = 158660981 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 (158664173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6102648 + ... + 6102673.

It is an arithmetic number, because the mean of its divisors is an integer number (42718627).

Almost surely, 2^158669173 is an apocalyptic number.

158669173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

158669173 is a deficient number, since it is larger than the sum of its proper divisors (12205335).

158669173 is a wasteful number, since it uses less digits than its factorization.

158669173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12205334.

The product of its digits is 272160, while the sum is 46.

The square root of 158669173 is about 12596.3952383212. The cubic root of 158669173 is about 541.3741556392.

The spelling of 158669173 in words is "one hundred fifty-eight million, six hundred sixty-nine thousand, one hundred seventy-three".