158971749 has 4 divisors (see below), whose sum is σ = 211962336. Its totient is φ = 105981164.

The previous prime is 158971741. The next prime is 158971753. The reversal of 158971749 is 947179851.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 947179851 = 3 ⋅315726617.

It is a cyclic number.

It is not a de Polignac number, because 158971749 - 2³ = 158971741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158971741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26495289 + ... + 26495294.

It is an arithmetic number, because the mean of its divisors is an integer number (52990584).

Almost surely, 2^158971749 is an apocalyptic number.

It is an amenable number.

158971749 is a deficient number, since it is larger than the sum of its proper divisors (52990587).

158971749 is an equidigital number, since it uses as much as digits as its factorization.

158971749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52990586.

The product of its digits is 635040, while the sum is 51.

The square root of 158971749 is about 12608.3999381365. The cubic root of 158971749 is about 541.7180636778.

The spelling of 158971749 in words is "one hundred fifty-eight million, nine hundred seventy-one thousand, seven hundred forty-nine".