158726987 has 4 divisors (see below), whose sum is σ = 159677616. Its totient is φ = 157776360.

The previous prime is 158726963. The next prime is 158726989. The reversal of 158726987 is 789627851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789627851 = 907 ⋅870593.

It is a cyclic number.

It is not a de Polignac number, because 158726987 - 2²⁴ = 141949771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158726989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475064 + ... + 475397.

It is an arithmetic number, because the mean of its divisors is an integer number (39919404).

Almost surely, 2^158726987 is an apocalyptic number.

158726987 is a deficient number, since it is larger than the sum of its proper divisors (950629).

158726987 is an equidigital number, since it uses as much as digits as its factorization.

158726987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950628.

The product of its digits is 1693440, while the sum is 53.

The square root of 158726987 is about 12598.6898922070. The cubic root of 158726987 is about 541.4399008291.

The spelling of 158726987 in words is "one hundred fifty-eight million, seven hundred twenty-six thousand, nine hundred eighty-seven".