158234981 has 2 divisors, whose sum is σ = 158234982. Its totient is φ = 158234980.

The previous prime is 158234971. The next prime is 158234987. The reversal of 158234981 is 189432851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157904356 + 330625 = 12566^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 158234981 - 2¹⁴ = 158218597 is a prime.

It is a super-2 number, since 2×158234981² = 50076618424140722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158234987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79117490 + 79117491.

It is an arithmetic number, because the mean of its divisors is an integer number (79117491).

Almost surely, 2^158234981 is an apocalyptic number.

It is an amenable number.

158234981 is a deficient number, since it is larger than the sum of its proper divisors (1).

158234981 is an equidigital number, since it uses as much as digits as its factorization.

158234981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 158234981 is about 12579.1486595874. The cubic root of 158234981 is about 540.8798880999.

It can be divided in two parts, 1582 and 34981, that added together give a palindrome (36563).

The spelling of 158234981 in words is "one hundred fifty-eight million, two hundred thirty-four thousand, nine hundred eighty-one".