158864187 has 18 divisors (see below), whose sum is σ = 224139252. Its totient is φ = 100073304.

The previous prime is 158864177. The next prime is 158864203. The reversal of 158864187 is 781468851.

It is a happy number.

158864187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158864187 - 2¹⁹ = 158339899 is a prime.

It is a super-2 number, since 2×158864187² = 50475659822341938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158864177) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 414598 + ... + 414980.

Almost surely, 2^158864187 is an apocalyptic number.

158864187 is a deficient number, since it is larger than the sum of its proper divisors (65275065).

158864187 is an frugal number, since it uses more digits than its factorization.

158864187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 405 counting only the distinct ones).

The product of its digits is 430080, while the sum is 48.

The square root of 158864187 is about 12604.1337266787. The cubic root of 158864187 is about 541.5958586837.

Multiplying 158864187 by its sum of digits (48), we get a square (7625480976 = 87324²).

The spelling of 158864187 in words is "one hundred fifty-eight million, eight hundred sixty-four thousand, one hundred eighty-seven".