158734861 has 2 divisors, whose sum is σ = 158734862. Its totient is φ = 158734860.

The previous prime is 158734853. The next prime is 158734889. The reversal of 158734861 is 168437851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158608836 + 126025 = 12594^2 + 355^2 .

It is an emirp because it is prime and its reverse (168437851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158734861 - 2³ = 158734853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158734361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79367430 + 79367431.

It is an arithmetic number, because the mean of its divisors is an integer number (79367431).

Almost surely, 2^158734861 is an apocalyptic number.

It is an amenable number.

158734861 is a deficient number, since it is larger than the sum of its proper divisors (1).

158734861 is an equidigital number, since it uses as much as digits as its factorization.

158734861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 158734861 is about 12599.0023811411. The cubic root of 158734861 is about 541.4488537853.

The spelling of 158734861 in words is "one hundred fifty-eight million, seven hundred thirty-four thousand, eight hundred sixty-one".