158720189 has 2 divisors, whose sum is σ = 158720190. Its totient is φ = 158720188.

The previous prime is 158720147. The next prime is 158720201. The reversal of 158720189 is 981027851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156675289 + 2044900 = 12517^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 158720189 - 2²⁴ = 141942973 is a prime.

It is a super-3 number, since 3×158720189³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158720689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79360094 + 79360095.

It is an arithmetic number, because the mean of its divisors is an integer number (79360095).

Almost surely, 2^158720189 is an apocalyptic number.

It is an amenable number.

158720189 is a deficient number, since it is larger than the sum of its proper divisors (1).

158720189 is an equidigital number, since it uses as much as digits as its factorization.

158720189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 158720189 is about 12598.4200993617. The cubic root of 158720189 is about 541.4321710766.

The spelling of 158720189 in words is "one hundred fifty-eight million, seven hundred twenty thousand, one hundred eighty-nine".