158987901 has 8 divisors (see below), whose sum is σ = 212232960. Its totient is φ = 105867392.

The previous prime is 158987897. The next prime is 158987921. The reversal of 158987901 is 109789851.

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 158987901 - 2² = 158987897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158987921) 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 7 ways as a sum of consecutive naturals, for example, 28116 + ... + 33293.

It is an arithmetic number, because the mean of its divisors is an integer number (26529120).

Almost surely, 2^158987901 is an apocalyptic number.

It is an amenable number.

158987901 is a deficient number, since it is larger than the sum of its proper divisors (53245059).

158987901 is an equidigital number, since it uses as much as digits as its factorization.

158987901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62275.

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 158987901 is about 12609.0404472347. The cubic root of 158987901 is about 541.7364097758.

The spelling of 158987901 in words is "one hundred fifty-eight million, nine hundred eighty-seven thousand, nine hundred one".