5127821957 has 2 divisors, whose sum is σ = 5127821958. Its totient is φ = 5127821956.

The previous prime is 5127821903. The next prime is 5127821987. The reversal of 5127821957 is 7591287215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4282524481 + 845297476 = 65441^2 + 29074^2 .

It is a cyclic number.

It is not a de Polignac number, because 5127821957 - 2⁶ = 5127821893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5127821987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563910978 + 2563910979.

It is an arithmetic number, because the mean of its divisors is an integer number (2563910979).

Almost surely, 2^5127821957 is an apocalyptic number.

It is an amenable number.

5127821957 is a deficient number, since it is larger than the sum of its proper divisors (1).

5127821957 is an equidigital number, since it uses as much as digits as its factorization.

5127821957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 47.

The square root of 5127821957 is about 71608.8120066239. The cubic root of 5127821957 is about 1724.4250083322.

The spelling of 5127821957 in words is "five billion, one hundred twenty-seven million, eight hundred twenty-one thousand, nine hundred fifty-seven".