155009089 has 4 divisors (see below), whose sum is σ = 160354260. Its totient is φ = 149663920.

The previous prime is 155009059. The next prime is 155009119. The reversal of 155009089 is 980900551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980900551 = 4651 ⋅210901.

It is an interprime number because it is at equal distance from previous prime (155009059) and next prime (155009119).

It can be written as a sum of positive squares in 2 ways, for example, as 93934864 + 61074225 = 9692^2 + 7815^2 .

It is a cyclic number.

It is not a de Polignac number, because 155009089 - 2¹³ = 155000897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155009059) 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, 2672542 + ... + 2672599.

It is an arithmetic number, because the mean of its divisors is an integer number (40088565).

Almost surely, 2^155009089 is an apocalyptic number.

It is an amenable number.

155009089 is a deficient number, since it is larger than the sum of its proper divisors (5345171).

155009089 is an equidigital number, since it uses as much as digits as its factorization.

155009089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345170.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 155009089 is about 12450.2646156618. The cubic root of 155009089 is about 537.1790349125.

The spelling of 155009089 in words is "one hundred fifty-five million, nine thousand, eighty-nine".