158948381 has 2 divisors, whose sum is σ = 158948382. Its totient is φ = 158948380.

The previous prime is 158948353. The next prime is 158948401. The reversal of 158948381 is 183849851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157879225 + 1069156 = 12565^2 + 1034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158948381 is a prime.

It is a super-2 number, since 2×158948381² = 50529175645042322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158948311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79474190 + 79474191.

It is an arithmetic number, because the mean of its divisors is an integer number (79474191).

Almost surely, 2^158948381 is an apocalyptic number.

It is an amenable number.

158948381 is a deficient number, since it is larger than the sum of its proper divisors (1).

158948381 is an equidigital number, since it uses as much as digits as its factorization.

158948381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 47.

The square root of 158948381 is about 12607.4732202769. The cubic root of 158948381 is about 541.6915191543.

The spelling of 158948381 in words is "one hundred fifty-eight million, nine hundred forty-eight thousand, three hundred eighty-one".