158681983 has 4 divisors (see below), whose sum is σ = 159823720. Its totient is φ = 157540248.

The previous prime is 158681981. The next prime is 158681993. The reversal of 158681983 is 389186851.

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

It is a cyclic number.

It is not a de Polignac number, because 158681983 - 2¹ = 158681981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158681981) 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, 570660 + ... + 570937.

It is an arithmetic number, because the mean of its divisors is an integer number (39955930).

Almost surely, 2^158681983 is an apocalyptic number.

158681983 is a deficient number, since it is larger than the sum of its proper divisors (1141737).

158681983 is a wasteful number, since it uses less digits than its factorization.

158681983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141736.

The product of its digits is 414720, while the sum is 49.

The square root of 158681983 is about 12596.9037068638. The cubic root of 158681983 is about 541.3887243509.

The spelling of 158681983 in words is "one hundred fifty-eight million, six hundred eighty-one thousand, nine hundred eighty-three".