158491447 has 2 divisors, whose sum is σ = 158491448. Its totient is φ = 158491446.

The previous prime is 158491439. The next prime is 158491451. The reversal of 158491447 is 744194851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 158491447 - 2³ = 158491439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158491457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79245723 + 79245724.

It is an arithmetic number, because the mean of its divisors is an integer number (79245724).

Almost surely, 2^158491447 is an apocalyptic number.

158491447 is a deficient number, since it is larger than the sum of its proper divisors (1).

158491447 is an equidigital number, since it uses as much as digits as its factorization.

158491447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 158491447 is about 12589.3386244076. The cubic root of 158491447 is about 541.1719483088.

The spelling of 158491447 in words is "one hundred fifty-eight million, four hundred ninety-one thousand, four hundred forty-seven".