158338121 has 2 divisors, whose sum is σ = 158338122. Its totient is φ = 158338120.

The previous prime is 158338109. The next prime is 158338151. The reversal of 158338121 is 121833851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147282496 + 11055625 = 12136^2 + 3325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158338121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158338151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79169060 + 79169061.

It is an arithmetic number, because the mean of its divisors is an integer number (79169061).

Almost surely, 2^158338121 is an apocalyptic number.

It is an amenable number.

158338121 is a deficient number, since it is larger than the sum of its proper divisors (1).

158338121 is an equidigital number, since it uses as much as digits as its factorization.

158338121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 158338121 is about 12583.2476332622. The cubic root of 158338121 is about 540.9973805256.

The spelling of 158338121 in words is "one hundred fifty-eight million, three hundred thirty-eight thousand, one hundred twenty-one".