158190397 has 2 divisors, whose sum is σ = 158190398. Its totient is φ = 158190396.

The previous prime is 158190379. The next prime is 158190433. The reversal of 158190397 is 793091851.

Together with previous prime (158190379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119115396 + 39075001 = 10914^2 + 6251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158190397 is a prime.

It is equal to p_8878660 and since 158190397 and 8878660 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158190337) 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, 79095198 + 79095199.

It is an arithmetic number, because the mean of its divisors is an integer number (79095199).

Almost surely, 2^158190397 is an apocalyptic number.

It is an amenable number.

158190397 is a deficient number, since it is larger than the sum of its proper divisors (1).

158190397 is an equidigital number, since it uses as much as digits as its factorization.

158190397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 158190397 is about 12577.3763957353. The cubic root of 158190397 is about 540.8290842175.

The spelling of 158190397 in words is "one hundred fifty-eight million, one hundred ninety thousand, three hundred ninety-seven".