2649149387 has 4 divisors (see below), whose sum is σ = 2650097976. Its totient is φ = 2648200800.

The previous prime is 2649149369. The next prime is 2649149401. The reversal of 2649149387 is 7839419462.

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

It is a cyclic number.

It is not a de Polignac number, because 2649149387 - 2⁶ = 2649149323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649140387) 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, 470093 + ... + 475694.

It is an arithmetic number, because the mean of its divisors is an integer number (662524494).

Almost surely, 2^2649149387 is an apocalyptic number.

2649149387 is a deficient number, since it is larger than the sum of its proper divisors (948589).

2649149387 is an equidigital number, since it uses as much as digits as its factorization.

2649149387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948588.

The product of its digits is 2612736, while the sum is 53.

The square root of 2649149387 is about 51469.8881580289. Note that the first 3 decimals coincide. The cubic root of 2649149387 is about 1383.6794246971.

The spelling of 2649149387 in words is "two billion, six hundred forty-nine million, one hundred forty-nine thousand, three hundred eighty-seven".