2177149489 has 4 divisors (see below), whose sum is σ = 2305217124. Its totient is φ = 2049081856.

The previous prime is 2177149477. The next prime is 2177149519. The reversal of 2177149489 is 9849417712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1204645264 + 972504225 = 34708^2 + 31185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2177149489 - 2⁷ = 2177149361 is a prime.

It is a super-2 number, since 2×2177149489² = 9479959794905922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2177149439) 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, 64033792 + ... + 64033825.

It is an arithmetic number, because the mean of its divisors is an integer number (576304281).

Almost surely, 2^2177149489 is an apocalyptic number.

It is an amenable number.

2177149489 is a deficient number, since it is larger than the sum of its proper divisors (128067635).

2177149489 is a wasteful number, since it uses less digits than its factorization.

2177149489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128067634.

The product of its digits is 1016064, while the sum is 52.

The square root of 2177149489 is about 46659.9345155991. The cubic root of 2177149489 is about 1296.0728603760.

The spelling of 2177149489 in words is "two billion, one hundred seventy-seven million, one hundred forty-nine thousand, four hundred eighty-nine".