158644069 has 2 divisors, whose sum is σ = 158644070. Its totient is φ = 158644068.

The previous prime is 158644043. The next prime is 158644093. The reversal of 158644069 is 960446851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154703844 + 3940225 = 12438^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 158644069 - 2¹³ = 158635877 is a prime.

It is a super-2 number, since 2×158644069² = 50335881257753522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158644039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79322034 + 79322035.

It is an arithmetic number, because the mean of its divisors is an integer number (79322035).

Almost surely, 2^158644069 is an apocalyptic number.

It is an amenable number.

158644069 is a deficient number, since it is larger than the sum of its proper divisors (1).

158644069 is an equidigital number, since it uses as much as digits as its factorization.

158644069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 158644069 is about 12595.3987233434. The cubic root of 158644069 is about 541.3456027843.

The spelling of 158644069 in words is "one hundred fifty-eight million, six hundred forty-four thousand, sixty-nine".