2089177581 has 4 divisors (see below), whose sum is σ = 2785570112. Its totient is φ = 1392785052.

The previous prime is 2089177579. The next prime is 2089177609. The reversal of 2089177581 is 1857719802.

It is a happy number.

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.

It is not a de Polignac number, because 2089177581 - 2¹ = 2089177579 is a prime.

It is a super-2 number, since 2×2089177581² = 8729325929906023122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2089177581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2089177511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348196261 + ... + 348196266.

It is an arithmetic number, because the mean of its divisors is an integer number (696392528).

Almost surely, 2^2089177581 is an apocalyptic number.

It is an amenable number.

2089177581 is a deficient number, since it is larger than the sum of its proper divisors (696392531).

2089177581 is an equidigital number, since it uses as much as digits as its factorization.

2089177581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696392530.

The product of its (nonzero) digits is 282240, while the sum is 48.

The square root of 2089177581 is about 45707.5221489855. The cubic root of 2089177581 is about 1278.3755395547.

The spelling of 2089177581 in words is "two billion, eighty-nine million, one hundred seventy-seven thousand, five hundred eighty-one".