2649470687 has 4 divisors (see below), whose sum is σ = 2685764880. Its totient is φ = 2613176496.

The previous prime is 2649470669. The next prime is 2649470693. The reversal of 2649470687 is 7860749462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7860749462 = 2 ⋅3930374731.

It is a cyclic number.

It is not a de Polignac number, because 2649470687 - 2¹⁰ = 2649469663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649470617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18146987 + ... + 18147132.

It is an arithmetic number, because the mean of its divisors is an integer number (671441220).

Almost surely, 2^2649470687 is an apocalyptic number.

2649470687 is a deficient number, since it is larger than the sum of its proper divisors (36294193).

2649470687 is an equidigital number, since it uses as much as digits as its factorization.

2649470687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36294192.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The square root of 2649470687 is about 51473.0093058488. The cubic root of 2649470687 is about 1383.7353619260.

The spelling of 2649470687 in words is "two billion, six hundred forty-nine million, four hundred seventy thousand, six hundred eighty-seven".