2144939247 has 24 divisors (see below), whose sum is σ = 3471258960. Its totient is φ = 1264826880.

The previous prime is 2144939243. The next prime is 2144939257. The reversal of 2144939247 is 7429394412.

2144939247 is a `hidden beast` number, since 214 + 4 + 9 + 392 + 47 = 666.

It is not a de Polignac number, because 2144939247 - 2² = 2144939243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144939243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289122 + ... + 296447.

It is an arithmetic number, because the mean of its divisors is an integer number (144635790).

Almost surely, 2^2144939247 is an apocalyptic number.

2144939247 is a deficient number, since it is larger than the sum of its proper divisors (1326319713).

2144939247 is a wasteful number, since it uses less digits than its factorization.

2144939247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585623 (or 585620 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 2144939247 is about 46313.4888234519. The cubic root of 2144939247 is about 1289.6494143742.

The spelling of 2144939247 in words is "two billion, one hundred forty-four million, nine hundred thirty-nine thousand, two hundred forty-seven".