5127821987 has 2 divisors, whose sum is σ = 5127821988. Its totient is φ = 5127821986.

The previous prime is 5127821957. The next prime is 5127821999. The reversal of 5127821987 is 7891287215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5127821987 - 2¹⁰ = 5127820963 is a prime.

It is not a weakly prime, because it can be changed into another prime (5127821957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563910993 + 2563910994.

It is an arithmetic number, because the mean of its divisors is an integer number (2563910994).

Almost surely, 2^5127821987 is an apocalyptic number.

5127821987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5127821987 is an equidigital number, since it uses as much as digits as its factorization.

5127821987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 50.

The square root of 5127821987 is about 71608.8122160953. The cubic root of 5127821987 is about 1724.4250116951.

The spelling of 5127821987 in words is "five billion, one hundred twenty-seven million, eight hundred twenty-one thousand, nine hundred eighty-seven".