9973531 has 2 divisors, whose sum is σ = 9973532. Its totient is φ = 9973530.

The previous prime is 9973517. The next prime is 9973547. The reversal of 9973531 is 1353799.

9973531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9973531 - 2¹¹ = 9971483 is a prime.

It is a super-2 number, since 2×9973531² = 198942641215922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9973511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986765 + 4986766.

It is an arithmetic number, because the mean of its divisors is an integer number (4986766).

Almost surely, 2^9973531 is an apocalyptic number.

9973531 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973531 is an equidigital number, since it uses as much as digits as its factorization.

9973531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25515, while the sum is 37.

The square root of 9973531 is about 3158.0897707317. The cubic root of 9973531 is about 215.2532152708.

The spelling of 9973531 in words is "nine million, nine hundred seventy-three thousand, five hundred thirty-one".