158635489 has 4 divisors (see below), whose sum is σ = 158682160. Its totient is φ = 158588820.

The previous prime is 158635447. The next prime is 158635523. The reversal of 158635489 is 984536851.

158635489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158635489 - 2⁷ = 158635361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158635409) 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, 17799 + ... + 25180.

It is an arithmetic number, because the mean of its divisors is an integer number (39670540).

Almost surely, 2^158635489 is an apocalyptic number.

It is an amenable number.

158635489 is a deficient number, since it is larger than the sum of its proper divisors (46671).

158635489 is an equidigital number, since it uses as much as digits as its factorization.

158635489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46670.

The product of its digits is 1036800, while the sum is 49.

The square root of 158635489 is about 12595.0581181668. The cubic root of 158635489 is about 541.3358433502.

The spelling of 158635489 in words is "one hundred fifty-eight million, six hundred thirty-five thousand, four hundred eighty-nine".