158767381 has 2 divisors, whose sum is σ = 158767382. Its totient is φ = 158767380.

The previous prime is 158767361. The next prime is 158767409. The reversal of 158767381 is 183767851.

158767381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144817156 + 13950225 = 12034^2 + 3735^2 .

It is a cyclic number.

It is not a de Polignac number, because 158767381 - 2¹⁵ = 158734613 is a prime.

It is a super-2 number, since 2×158767381² = 50414162539198322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158767331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79383690 + 79383691.

It is an arithmetic number, because the mean of its divisors is an integer number (79383691).

Almost surely, 2^158767381 is an apocalyptic number.

It is an amenable number.

158767381 is a deficient number, since it is larger than the sum of its proper divisors (1).

158767381 is an equidigital number, since it uses as much as digits as its factorization.

158767381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 46.

The square root of 158767381 is about 12600.2928934212. The cubic root of 158767381 is about 541.4858267903.

The spelling of 158767381 in words is "one hundred fifty-eight million, seven hundred sixty-seven thousand, three hundred eighty-one".