158243403 has 4 divisors (see below), whose sum is σ = 210991208. Its totient is φ = 105495600.

The previous prime is 158243389. The next prime is 158243411. The reversal of 158243403 is 304342851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304342851 = 3 ⋅101447617.

It is not a de Polignac number, because 158243403 - 2⁴ = 158243387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158243203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26373898 + ... + 26373903.

It is an arithmetic number, because the mean of its divisors is an integer number (52747802).

Almost surely, 2^158243403 is an apocalyptic number.

158243403 is a deficient number, since it is larger than the sum of its proper divisors (52747805).

158243403 is an equidigital number, since it uses as much as digits as its factorization.

158243403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52747804.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 158243403 is about 12579.4834154666. The cubic root of 158243403 is about 540.8894839756.

The spelling of 158243403 in words is "one hundred fifty-eight million, two hundred forty-three thousand, four hundred three".