5721138239 has 2 divisors, whose sum is σ = 5721138240. Its totient is φ = 5721138238.

The previous prime is 5721138191. The next prime is 5721138253. The reversal of 5721138239 is 9328311275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5721138239 - 2¹² = 5721134143 is a prime.

It is a super-2 number, since 2×5721138239² = 65462845499496042242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5721138196 and 5721138205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5721138259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2860569119 + 2860569120.

It is an arithmetic number, because the mean of its divisors is an integer number (2860569120).

Almost surely, 2^5721138239 is an apocalyptic number.

5721138239 is a deficient number, since it is larger than the sum of its proper divisors (1).

5721138239 is an equidigital number, since it uses as much as digits as its factorization.

5721138239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 5721138239 is about 75638.2062122047. The cubic root of 5721138239 is about 1788.5214259271.

The spelling of 5721138239 in words is "five billion, seven hundred twenty-one million, one hundred thirty-eight thousand, two hundred thirty-nine".