5383135721 has 2 divisors, whose sum is σ = 5383135722. Its totient is φ = 5383135720.

The previous prime is 5383135687. The next prime is 5383135739. The reversal of 5383135721 is 1275313835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2796294400 + 2586841321 = 52880^2 + 50861^2 .

It is a cyclic number.

It is not a de Polignac number, because 5383135721 - 2¹⁴ = 5383119337 is a prime.

It is not a weakly prime, because it can be changed into another prime (5383135421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2691567860 + 2691567861.

It is an arithmetic number, because the mean of its divisors is an integer number (2691567861).

Almost surely, 2^5383135721 is an apocalyptic number.

It is an amenable number.

5383135721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5383135721 is an equidigital number, since it uses as much as digits as its factorization.

5383135721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 5383135721 is about 73369.8556697504. The cubic root of 5383135721 is about 1752.5823883481.

The spelling of 5383135721 in words is "five billion, three hundred eighty-three million, one hundred thirty-five thousand, seven hundred twenty-one".