158071609 has 4 divisors (see below), whose sum is σ = 158112000. Its totient is φ = 158031220.

The previous prime is 158071597. The next prime is 158071619. The reversal of 158071609 is 906170851.

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 158071609 - 2⁵ = 158071577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158071619) 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, 13609 + ... + 22390.

It is an arithmetic number, because the mean of its divisors is an integer number (39528000).

Almost surely, 2^158071609 is an apocalyptic number.

It is an amenable number.

158071609 is a deficient number, since it is larger than the sum of its proper divisors (40391).

158071609 is an equidigital number, since it uses as much as digits as its factorization.

158071609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40390.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 158071609 is about 12572.6532203827. The cubic root of 158071609 is about 540.6936775728.

The spelling of 158071609 in words is "one hundred fifty-eight million, seventy-one thousand, six hundred nine".