2491486289 has 4 divisors (see below), whose sum is σ = 2638044324. Its totient is φ = 2344928256.

The previous prime is 2491486273. The next prime is 2491486301. The reversal of 2491486289 is 9826841942.

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 1190802064 + 1300684225 = 34508^2 + 36065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491486289 - 2⁴ = 2491486273 is a prime.

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 2491486289.

It is not an unprimeable number, because it can be changed into a prime (2491486189) 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, 73278992 + ... + 73279025.

It is an arithmetic number, because the mean of its divisors is an integer number (659511081).

Almost surely, 2^2491486289 is an apocalyptic number.

It is an amenable number.

2491486289 is a deficient number, since it is larger than the sum of its proper divisors (146558035).

2491486289 is a wasteful number, since it uses less digits than its factorization.

2491486289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146558034.

The product of its digits is 1990656, while the sum is 53.

The square root of 2491486289 is about 49914.7902830414. The cubic root of 2491486289 is about 1355.6664049519. Note that the first 3 decimals are identical.

The spelling of 2491486289 in words is "two billion, four hundred ninety-one million, four hundred eighty-six thousand, two hundred eighty-nine".