9972387839 has 2 divisors, whose sum is σ = 9972387840. Its totient is φ = 9972387838.

The previous prime is 9972387793. The next prime is 9972387877. The reversal of 9972387839 is 9387832799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9972387839 - 2²⁸ = 9703952383 is a prime.

It is a super-2 number, since 2×9972387839² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9972380839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986193919 + 4986193920.

It is an arithmetic number, because the mean of its divisors is an integer number (4986193920).

Almost surely, 2^9972387839 is an apocalyptic number.

9972387839 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972387839 is an equidigital number, since it uses as much as digits as its factorization.

9972387839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 65.

The square root of 9972387839 is about 99861.8437592657. The cubic root of 9972387839 is about 2152.4499088553.

The spelling of 9972387839 in words is "nine billion, nine hundred seventy-two million, three hundred eighty-seven thousand, eight hundred thirty-nine".