158996449 has 4 divisors (see below), whose sum is σ = 161996436. Its totient is φ = 155996464.

The previous prime is 158996419. The next prime is 158996471. The reversal of 158996449 is 944699851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75603025 + 83393424 = 8695^2 + 9132^2 .

It is a cyclic number.

It is not a de Polignac number, because 158996449 - 2⁵ = 158996417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158996449.

It is not an unprimeable number, because it can be changed into a prime (158996419) 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, 1499914 + ... + 1500019.

It is an arithmetic number, because the mean of its divisors is an integer number (40499109).

Almost surely, 2^158996449 is an apocalyptic number.

It is an amenable number.

158996449 is a deficient number, since it is larger than the sum of its proper divisors (2999987).

158996449 is an equidigital number, since it uses as much as digits as its factorization.

158996449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999986.

The product of its digits is 2799360, while the sum is 55.

The square root of 158996449 is about 12609.3794058233. The cubic root of 158996449 is about 541.7461184388.

The spelling of 158996449 in words is "one hundred fifty-eight million, nine hundred ninety-six thousand, four hundred forty-nine".