158203649 has 4 divisors (see below), whose sum is σ = 167509764. Its totient is φ = 148897536.

The previous prime is 158203631. The next prime is 158203663. The reversal of 158203649 is 946302851.

It is a happy number.

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 80640400 + 77563249 = 8980^2 + 8807^2 .

It is a cyclic number.

It is not a de Polignac number, because 158203649 - 2⁸ = 158203393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158203679) 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, 4653032 + ... + 4653065.

It is an arithmetic number, because the mean of its divisors is an integer number (41877441).

Almost surely, 2^158203649 is an apocalyptic number.

It is an amenable number.

158203649 is a deficient number, since it is larger than the sum of its proper divisors (9306115).

158203649 is an equidigital number, since it uses as much as digits as its factorization.

158203649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9306114.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 158203649 is about 12577.9032036345. The cubic root of 158203649 is about 540.8441859916.

The spelling of 158203649 in words is "one hundred fifty-eight million, two hundred three thousand, six hundred forty-nine".