9992531 has 2 divisors, whose sum is σ = 9992532. Its totient is φ = 9992530.

The previous prime is 9992497. The next prime is 9992533. The reversal of 9992531 is 1352999.

9992531 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 (1352999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9992531 - 2¹⁸ = 9730387 is a prime.

It is a super-2 number, since 2×9992531² = 199701351571922, which contains 22 as substring.

Together with 9992533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9992533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996265 + 4996266.

It is an arithmetic number, because the mean of its divisors is an integer number (4996266).

Almost surely, 2^9992531 is an apocalyptic number.

9992531 is a deficient number, since it is larger than the sum of its proper divisors (1).

9992531 is an equidigital number, since it uses as much as digits as its factorization.

9992531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 38.

The square root of 9992531 is about 3161.0964869804. The cubic root of 9992531 is about 215.3898174012.

The spelling of 9992531 in words is "nine million, nine hundred ninety-two thousand, five hundred thirty-one".