2781872247 has 48 divisors (see below), whose sum is σ = 4771671552. Its totient is φ = 1425271680.

The previous prime is 2781872221. The next prime is 2781872273. The reversal of 2781872247 is 7422781872.

It is an interprime number because it is at equal distance from previous prime (2781872221) and next prime (2781872273).

It is not a de Polignac number, because 2781872247 - 2⁸ = 2781871991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2781872196 and 2781872205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781872207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106258 + ... + 129824.

It is an arithmetic number, because the mean of its divisors is an integer number (99409824).

Almost surely, 2^2781872247 is an apocalyptic number.

2781872247 is a deficient number, since it is larger than the sum of its proper divisors (1989799305).

2781872247 is a wasteful number, since it uses less digits than its factorization.

2781872247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23668 (or 23661 counting only the distinct ones).

The product of its digits is 702464, while the sum is 48.

The square root of 2781872247 is about 52743.4569117346. The cubic root of 2781872247 is about 1406.4114515746.

The spelling of 2781872247 in words is "two billion, seven hundred eighty-one million, eight hundred seventy-two thousand, two hundred forty-seven".