9252721537 has 2 divisors, whose sum is σ = 9252721538. Its totient is φ = 9252721536.

The previous prime is 9252721523. The next prime is 9252721549. The reversal of 9252721537 is 7351272529.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5087826241 + 4164895296 = 71329^2 + 64536^2 .

It is an emirp because it is prime and its reverse (7351272529) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9252721537 - 2⁷ = 9252721409 is a prime.

It is a super-2 number, since 2×9252721537² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9252721493 and 9252721502.

It is not a weakly prime, because it can be changed into another prime (9252721567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4626360768 + 4626360769.

It is an arithmetic number, because the mean of its divisors is an integer number (4626360769).

Almost surely, 2^9252721537 is an apocalyptic number.

It is an amenable number.

9252721537 is a deficient number, since it is larger than the sum of its proper divisors (1).

9252721537 is an equidigital number, since it uses as much as digits as its factorization.

9252721537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 43.

The square root of 9252721537 is about 96191.0678649530. The cubic root of 9252721537 is about 2099.3740792934.

The spelling of 9252721537 in words is "nine billion, two hundred fifty-two million, seven hundred twenty-one thousand, five hundred thirty-seven".