158353981 has 2 divisors, whose sum is σ = 158353982. Its totient is φ = 158353980.

The previous prime is 158353967. The next prime is 158354017. The reversal of 158353981 is 189353851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134676025 + 23677956 = 11605^2 + 4866^2 .

It is a cyclic number.

It is not a de Polignac number, because 158353981 - 2²¹ = 156256829 is a prime.

It is a super-2 number, since 2×158353981² = 50151966597096722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158353381) 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, 79176990 + 79176991.

It is an arithmetic number, because the mean of its divisors is an integer number (79176991).

Almost surely, 2^158353981 is an apocalyptic number.

It is an amenable number.

158353981 is a deficient number, since it is larger than the sum of its proper divisors (1).

158353981 is an equidigital number, since it uses as much as digits as its factorization.

158353981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The square root of 158353981 is about 12583.8778204495. The cubic root of 158353981 is about 541.0154429942.

The spelling of 158353981 in words is "one hundred fifty-eight million, three hundred fifty-three thousand, nine hundred eighty-one".