158353681 has 2 divisors, whose sum is σ = 158353682. Its totient is φ = 158353680.

The previous prime is 158353639. The next prime is 158353693. The reversal of 158353681 is 186353851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144216081 + 14137600 = 12009^2 + 3760^2 .

It is an emirp because it is prime and its reverse (186353851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158353681 - 2¹⁵ = 158320913 is a prime.

It is a super-2 number, since 2×158353681² = 50151776572499522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (158353631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79176840 + 79176841.

It is an arithmetic number, because the mean of its divisors is an integer number (79176841).

Almost surely, 2^158353681 is an apocalyptic number.

It is an amenable number.

158353681 is a deficient number, since it is larger than the sum of its proper divisors (1).

158353681 is an equidigital number, since it uses as much as digits as its factorization.

158353681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 40.

The square root of 158353681 is about 12583.8659004298. The cubic root of 158353681 is about 541.0151013445.

The spelling of 158353681 in words is "one hundred fifty-eight million, three hundred fifty-three thousand, six hundred eighty-one".