158117787 has 6 divisors (see below), whose sum is σ = 228392372. Its totient is φ = 105411852.

The previous prime is 158117779. The next prime is 158117797. The reversal of 158117787 is 787711851.

It is not a de Polignac number, because 158117787 - 2³ = 158117779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158117717) 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 in 5 ways as a sum of consecutive naturals, for example, 8784313 + ... + 8784330.

Almost surely, 2^158117787 is an apocalyptic number.

158117787 is a deficient number, since it is larger than the sum of its proper divisors (70274585).

158117787 is a wasteful number, since it uses less digits than its factorization.

158117787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17568649 (or 17568646 counting only the distinct ones).

The product of its digits is 109760, while the sum is 45.

The square root of 158117787 is about 12574.4895323826. The cubic root of 158117787 is about 540.7463240113.

The spelling of 158117787 in words is "one hundred fifty-eight million, one hundred seventeen thousand, seven hundred eighty-seven".