158265389 has 2 divisors, whose sum is σ = 158265390. Its totient is φ = 158265388.

The previous prime is 158265379. The next prime is 158265431. The reversal of 158265389 is 983562851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 71961289 = 9290^2 + 8483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158265389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158265329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79132694 + 79132695.

It is an arithmetic number, because the mean of its divisors is an integer number (79132695).

Almost surely, 2^158265389 is an apocalyptic number.

It is an amenable number.

158265389 is a deficient number, since it is larger than the sum of its proper divisors (1).

158265389 is an equidigital number, since it uses as much as digits as its factorization.

158265389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 47.

The square root of 158265389 is about 12580.3572683768. The cubic root of 158265389 is about 540.9145328249.

The spelling of 158265389 in words is "one hundred fifty-eight million, two hundred sixty-five thousand, three hundred eighty-nine".