2487121993 has 2 divisors, whose sum is σ = 2487121994. Its totient is φ = 2487121992.

The previous prime is 2487121991. The next prime is 2487122009. The reversal of 2487121993 is 3991217842.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2455896249 + 31225744 = 49557^2 + 5588^2 .

It is a cyclic number.

It is not a de Polignac number, because 2487121993 - 2¹ = 2487121991 is a prime.

Together with 2487121991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2487121991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1243560996 + 1243560997.

It is an arithmetic number, because the mean of its divisors is an integer number (1243560997).

Almost surely, 2^2487121993 is an apocalyptic number.

It is an amenable number.

2487121993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2487121993 is an equidigital number, since it uses as much as digits as its factorization.

2487121993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 2487121993 is about 49871.0536584099. The cubic root of 2487121993 is about 1354.8743760480.

It can be divided in two parts, 24871 and 21993, that added together give a palindrome (46864).

The spelling of 2487121993 in words is "two billion, four hundred eighty-seven million, one hundred twenty-one thousand, nine hundred ninety-three".