158729987 has 8 divisors (see below), whose sum is σ = 172861920. Its totient is φ = 144872640.

The previous prime is 158729917. The next prime is 158729999. The reversal of 158729987 is 789927851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158729987 - 2¹⁴ = 158713603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158729917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67439 + ... + 69752.

It is an arithmetic number, because the mean of its divisors is an integer number (21607740).

Almost surely, 2^158729987 is an apocalyptic number.

158729987 is a deficient number, since it is larger than the sum of its proper divisors (14131933).

158729987 is a wasteful number, since it uses less digits than its factorization.

158729987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137293.

The product of its digits is 2540160, while the sum is 56.

The square root of 158729987 is about 12598.8089516430. The cubic root of 158729987 is about 541.4433119472.

The spelling of 158729987 in words is "one hundred fifty-eight million, seven hundred twenty-nine thousand, nine hundred eighty-seven".