158690029 has 2 divisors, whose sum is σ = 158690030. Its totient is φ = 158690028.

The previous prime is 158690027. The next prime is 158690069. The reversal of 158690029 is 920096851.

It is an a-pointer prime, because the next prime (158690069) can be obtained adding 158690029 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94128804 + 64561225 = 9702^2 + 8035^2 .

It is a cyclic number.

It is not a de Polignac number, because 158690029 - 2¹ = 158690027 is a prime.

Together with 158690027, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 158689973 and 158690000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158690027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79345014 + 79345015.

It is an arithmetic number, because the mean of its divisors is an integer number (79345015).

Almost surely, 2^158690029 is an apocalyptic number.

It is an amenable number.

158690029 is a deficient number, since it is larger than the sum of its proper divisors (1).

158690029 is an equidigital number, since it uses as much as digits as its factorization.

158690029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 158690029 is about 12597.2230670096. The cubic root of 158690029 is about 541.3978746022.

The spelling of 158690029 in words is "one hundred fifty-eight million, six hundred ninety thousand, twenty-nine".