2209658049 has 21 divisors (see below), whose sum is σ = 3314875539. Its totient is φ = 1472259240.

The previous prime is 2209658039. The next prime is 2209658051. The reversal of 2209658049 is 9408569022.

The square root of 2209658049 is 47007.

It is a perfect power (a square), and thus also a powerful number.

2209658049 is a `hidden beast` number, since 2 + 20 + 9 + 6 + 580 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2537649 + 2207120400 = 1593^2 + 46980^2 .

It is not a de Polignac number, because 2209658049 - 2⁷ = 2209657921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2209657995 and 2209658013.

It is not an unprimeable number, because it can be changed into a prime (2209658039) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 1268319 + ... + 1270059.

Almost surely, 2^2209658049 is an apocalyptic number.

2209658049 is the 47007-th square number.

2209658049 is the 23504-th centered octagonal number.

It is an amenable number.

2209658049 is a deficient number, since it is larger than the sum of its proper divisors (1105217490).

2209658049 is an frugal number, since it uses more digits than its factorization.

2209658049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The cubic root of 2209658049 is about 1302.4918770546.

The spelling of 2209658049 in words is "two billion, two hundred nine million, six hundred fifty-eight thousand, forty-nine".