158670191 has 2 divisors, whose sum is σ = 158670192. Its totient is φ = 158670190.

The previous prime is 158670173. The next prime is 158670199. The reversal of 158670191 is 191076851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158670191 is a prime.

It is a super-3 number, since 3×158670191³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158670199) 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, 79335095 + 79335096.

It is an arithmetic number, because the mean of its divisors is an integer number (79335096).

Almost surely, 2^158670191 is an apocalyptic number.

158670191 is a deficient number, since it is larger than the sum of its proper divisors (1).

158670191 is an equidigital number, since it uses as much as digits as its factorization.

158670191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 158670191 is about 12596.4356466423. The cubic root of 158670191 is about 541.3753134312.

The spelling of 158670191 in words is "one hundred fifty-eight million, six hundred seventy thousand, one hundred ninety-one".