158172949 has 4 divisors (see below), whose sum is σ = 172552320. Its totient is φ = 143793580.

The previous prime is 158172941. The next prime is 158173007. The reversal of 158172949 is 949271851.

158172949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158172949 - 2³ = 158172941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158172899 and 158172908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158172941) 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, 7189669 + ... + 7189690.

It is an arithmetic number, because the mean of its divisors is an integer number (43138080).

Almost surely, 2^158172949 is an apocalyptic number.

It is an amenable number.

158172949 is a deficient number, since it is larger than the sum of its proper divisors (14379371).

158172949 is a wasteful number, since it uses less digits than its factorization.

158172949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14379370.

The product of its digits is 181440, while the sum is 46.

The square root of 158172949 is about 12576.6827502327. The cubic root of 158172949 is about 540.8091994605.

The spelling of 158172949 in words is "one hundred fifty-eight million, one hundred seventy-two thousand, nine hundred forty-nine".