158194123 has 2 divisors, whose sum is σ = 158194124. Its totient is φ = 158194122.

The previous prime is 158194111. The next prime is 158194199. The reversal of 158194123 is 321491851.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158194123 is a prime.

It is not a weakly prime, because it can be changed into another prime (158114123) 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 as a sum of consecutive naturals, namely, 79097061 + 79097062.

It is an arithmetic number, because the mean of its divisors is an integer number (79097062).

Almost surely, 2^158194123 is an apocalyptic number.

158194123 is a deficient number, since it is larger than the sum of its proper divisors (1).

158194123 is an equidigital number, since it uses as much as digits as its factorization.

158194123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 158194123 is about 12577.5245179646. The cubic root of 158194123 is about 540.8333303946.

The spelling of 158194123 in words is "one hundred fifty-eight million, one hundred ninety-four thousand, one hundred twenty-three".