158181943 has 2 divisors, whose sum is σ = 158181944. Its totient is φ = 158181942.

The previous prime is 158181917. The next prime is 158182027. The reversal of 158181943 is 349181851.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (349181851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158181943 - 2¹³ = 158173751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158181896 and 158181905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158181913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79090971 + 79090972.

It is an arithmetic number, because the mean of its divisors is an integer number (79090972).

Almost surely, 2^158181943 is an apocalyptic number.

158181943 is a deficient number, since it is larger than the sum of its proper divisors (1).

158181943 is an equidigital number, since it uses as much as digits as its factorization.

158181943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 158181943 is about 12577.0403116154. The cubic root of 158181943 is about 540.8194497293.

The spelling of 158181943 in words is "one hundred fifty-eight million, one hundred eighty-one thousand, nine hundred forty-three".