158143987 has 2 divisors, whose sum is σ = 158143988. Its totient is φ = 158143986.

The previous prime is 158143943. The next prime is 158143991. The reversal of 158143987 is 789341851.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158143987 is a prime.

It is not a weakly prime, because it can be changed into another prime (158143487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79071993 + 79071994.

It is an arithmetic number, because the mean of its divisors is an integer number (79071994).

Almost surely, 2^158143987 is an apocalyptic number.

158143987 is a deficient number, since it is larger than the sum of its proper divisors (1).

158143987 is an equidigital number, since it uses as much as digits as its factorization.

158143987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 158143987 is about 12575.5312810235. The cubic root of 158143987 is about 540.7761894500.

The spelling of 158143987 in words is "one hundred fifty-eight million, one hundred forty-three thousand, nine hundred eighty-seven".