158489831 has 2 divisors, whose sum is σ = 158489832. Its totient is φ = 158489830.

The previous prime is 158489819. The next prime is 158489839. The reversal of 158489831 is 138984851.

It is a strong prime.

It is an emirp because it is prime and its reverse (138984851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158489831 - 2²² = 154295527 is a prime.

It is a super-3 number, since 3×158489831³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158489839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79244915 + 79244916.

It is an arithmetic number, because the mean of its divisors is an integer number (79244916).

Almost surely, 2^158489831 is an apocalyptic number.

158489831 is a deficient number, since it is larger than the sum of its proper divisors (1).

158489831 is an equidigital number, since it uses as much as digits as its factorization.

158489831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 47.

The square root of 158489831 is about 12589.2744429534. The cubic root of 158489831 is about 541.1701090154.

The spelling of 158489831 in words is "one hundred fifty-eight million, four hundred eighty-nine thousand, eight hundred thirty-one".