2113499987 has 2 divisors, whose sum is σ = 2113499988. Its totient is φ = 2113499986.

The previous prime is 2113499981. The next prime is 2113500031. The reversal of 2113499987 is 7899943112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2113499987 - 2¹⁸ = 2113237843 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113499981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056749993 + 1056749994.

It is an arithmetic number, because the mean of its divisors is an integer number (1056749994).

Almost surely, 2^2113499987 is an apocalyptic number.

2113499987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113499987 is an equidigital number, since it uses as much as digits as its factorization.

2113499987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 2113499987 is about 45972.8179145025. The cubic root of 2113499987 is about 1283.3174012677.

It can be divided in two parts, 21134 and 99987, that added together give a palindrome (121121).

The spelling of 2113499987 in words is "two billion, one hundred thirteen million, four hundred ninety-nine thousand, nine hundred eighty-seven".