162557089 has 4 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 162362500.

The previous prime is 162557081. The next prime is 162557099. The reversal of 162557089 is 980755261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 980755261 = 337 ⋅2910253.

It is a cyclic number.

It is not a de Polignac number, because 162557089 - 2³ = 162557081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162557081) 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, 96037 + ... + 97714.

It is an arithmetic number, because the mean of its divisors is an integer number (40687920).

Almost surely, 2^162557089 is an apocalyptic number.

It is an amenable number.

162557089 is a deficient number, since it is larger than the sum of its proper divisors (194591).

162557089 is an equidigital number, since it uses as much as digits as its factorization.

162557089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194590.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 162557089 is about 12749.7878021558. The cubic root of 162557089 is about 545.7603381801.

The spelling of 162557089 in words is "one hundred sixty-two million, five hundred fifty-seven thousand, eighty-nine".