9972439 has 2 divisors, whose sum is σ = 9972440. Its totient is φ = 9972438.

The previous prime is 9972401. The next prime is 9972449. The reversal of 9972439 is 9342799.

9972439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (9342799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9972439 - 2¹³ = 9964247 is a prime.

It is a d-powerful number, because it can be written as 9² + 9⁴ + 7⁸ + 2⁷ + 4¹¹ + 3 + 9⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 9972395 and 9972404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9972449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986219 + 4986220.

It is an arithmetic number, because the mean of its divisors is an integer number (4986220).

Almost surely, 2^9972439 is an apocalyptic number.

9972439 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972439 is an equidigital number, since it uses as much as digits as its factorization.

9972439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 9972439 is about 3157.9168766768. The cubic root of 9972439 is about 215.2453589729.

The spelling of 9972439 in words is "nine million, nine hundred seventy-two thousand, four hundred thirty-nine".