2113556387 has 2 divisors, whose sum is σ = 2113556388. Its totient is φ = 2113556386.

The previous prime is 2113556327. The next prime is 2113556413. The reversal of 2113556387 is 7836553112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2113556387 - 2⁶ = 2113556323 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113556327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056778193 + 1056778194.

It is an arithmetic number, because the mean of its divisors is an integer number (1056778194).

Almost surely, 2^2113556387 is an apocalyptic number.

2113556387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113556387 is an equidigital number, since it uses as much as digits as its factorization.

2113556387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 2113556387 is about 45973.4313163592. The cubic root of 2113556387 is about 1283.3288165280.

The spelling of 2113556387 in words is "two billion, one hundred thirteen million, five hundred fifty-six thousand, three hundred eighty-seven".