2011897847 has 2 divisors, whose sum is σ = 2011897848. Its totient is φ = 2011897846.

The previous prime is 2011897841. The next prime is 2011897873. The reversal of 2011897847 is 7487981102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011897847 - 2²⁰ = 2010849271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011897841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005948923 + 1005948924.

It is an arithmetic number, because the mean of its divisors is an integer number (1005948924).

Almost surely, 2^2011897847 is an apocalyptic number.

2011897847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011897847 is an equidigital number, since it uses as much as digits as its factorization.

2011897847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 2011897847 is about 44854.1842752714. The cubic root of 2011897847 is about 1262.4145032715.

The spelling of 2011897847 in words is "two billion, eleven million, eight hundred ninety-seven thousand, eight hundred forty-seven".