158378789 has 4 divisors (see below), whose sum is σ = 158415840. Its totient is φ = 158341740.

The previous prime is 158378747. The next prime is 158378791. The reversal of 158378789 is 987873851.

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 158378789 - 2²⁰ = 157330213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158378719) 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, 11129 + ... + 20990.

It is an arithmetic number, because the mean of its divisors is an integer number (39603960).

Almost surely, 2^158378789 is an apocalyptic number.

It is an amenable number.

158378789 is a deficient number, since it is larger than the sum of its proper divisors (37051).

158378789 is an equidigital number, since it uses as much as digits as its factorization.

158378789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37050.

The product of its digits is 3386880, while the sum is 56.

The square root of 158378789 is about 12584.8634875393. The cubic root of 158378789 is about 541.0436936476.

The spelling of 158378789 in words is "one hundred fifty-eight million, three hundred seventy-eight thousand, seven hundred eighty-nine".