158996503 has 4 divisors (see below), whose sum is σ = 167364760. Its totient is φ = 150628248.

The previous prime is 158996501. The next prime is 158996521. The reversal of 158996503 is 305699851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305699851 = 2729 ⋅112019.

It is a cyclic number.

It is not a de Polignac number, because 158996503 - 2¹ = 158996501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158996501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4184100 + ... + 4184137.

It is an arithmetic number, because the mean of its divisors is an integer number (41841190).

Almost surely, 2^158996503 is an apocalyptic number.

158996503 is a deficient number, since it is larger than the sum of its proper divisors (8368257).

158996503 is an equidigital number, since it uses as much as digits as its factorization.

158996503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8368256.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 158996503 is about 12609.3815470863. The cubic root of 158996503 is about 541.7461797699.

The spelling of 158996503 in words is "one hundred fifty-eight million, nine hundred ninety-six thousand, five hundred three".