158691067 has 4 divisors (see below), whose sum is σ = 158814160. Its totient is φ = 158567976.

The previous prime is 158691031. The next prime is 158691083. The reversal of 158691067 is 760196851.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158691067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158695067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59592 + ... + 62197.

It is an arithmetic number, because the mean of its divisors is an integer number (39703540).

Almost surely, 2^158691067 is an apocalyptic number.

158691067 is a deficient number, since it is larger than the sum of its proper divisors (123093).

158691067 is a wasteful number, since it uses less digits than its factorization.

158691067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123092.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 158691067 is about 12597.2642664985. The cubic root of 158691067 is about 541.3990550371.

The spelling of 158691067 in words is "one hundred fifty-eight million, six hundred ninety-one thousand, sixty-seven".