2047847881 has 4 divisors (see below), whose sum is σ = 2048188564. Its totient is φ = 2047507200.

The previous prime is 2047847861. The next prime is 2047847887. The reversal of 2047847881 is 1887487402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1887487402 = 2 ⋅943743701.

It can be written as a sum of positive squares in 2 ways, for example, as 203918400 + 1843929481 = 14280^2 + 42941^2 .

It is a cyclic number.

It is not a de Polignac number, because 2047847881 - 2²⁹ = 1510976969 is a prime.

It is a super-2 number, since 2×2047847881² = 8387361887432380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2047847887) 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, 161160 + ... + 173401.

It is an arithmetic number, because the mean of its divisors is an integer number (512047141).

Almost surely, 2^2047847881 is an apocalyptic number.

It is an amenable number.

2047847881 is a deficient number, since it is larger than the sum of its proper divisors (340683).

2047847881 is an equidigital number, since it uses as much as digits as its factorization.

2047847881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340682.

The product of its (nonzero) digits is 802816, while the sum is 49.

The square root of 2047847881 is about 45253.1532713467. The cubic root of 2047847881 is about 1269.8893988871.

The spelling of 2047847881 in words is "two billion, forty-seven million, eight hundred forty-seven thousand, eight hundred eighty-one".