158638523 has 2 divisors, whose sum is σ = 158638524. Its totient is φ = 158638522.

The previous prime is 158638517. The next prime is 158638537. The reversal of 158638523 is 325836851.

It is a weak prime.

It is an emirp because it is prime and its reverse (325836851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158638523 - 2⁴ = 158638507 is a prime.

It is not a weakly prime, because it can be changed into another prime (158638423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79319261 + 79319262.

It is an arithmetic number, because the mean of its divisors is an integer number (79319262).

Almost surely, 2^158638523 is an apocalyptic number.

158638523 is a deficient number, since it is larger than the sum of its proper divisors (1).

158638523 is an equidigital number, since it uses as much as digits as its factorization.

158638523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The square root of 158638523 is about 12595.1785616560. The cubic root of 158638523 is about 541.3392944537.

The spelling of 158638523 in words is "one hundred fifty-eight million, six hundred thirty-eight thousand, five hundred twenty-three".