158023489 has 16 divisors (see below), whose sum is σ = 174770064. Its totient is φ = 141984000.

The previous prime is 158023487. The next prime is 158023499. The reversal of 158023489 is 984320851.

It can be written as a sum of positive squares in 8 ways, for example, as 19184400 + 138839089 = 4380^2 + 11783^2 .

It is a cyclic number.

It is not a de Polignac number, because 158023489 - 2¹ = 158023487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158023487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79107 + ... + 81079.

It is an arithmetic number, because the mean of its divisors is an integer number (10923129).

Almost surely, 2^158023489 is an apocalyptic number.

It is an amenable number.

158023489 is a deficient number, since it is larger than the sum of its proper divisors (16746575).

158023489 is a wasteful number, since it uses less digits than its factorization.

158023489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 158023489 is about 12570.7393975056. The cubic root of 158023489 is about 540.6388061963.

It can be divided in two parts, 15802 and 3489, that added together give a palindrome (19291).

The spelling of 158023489 in words is "one hundred fifty-eight million, twenty-three thousand, four hundred eighty-nine".