9887431 has 2 divisors, whose sum is σ = 9887432. Its totient is φ = 9887430.

The previous prime is 9887413. The next prime is 9887441. The reversal of 9887431 is 1347889.

Together with previous prime (9887413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9887431 - 2¹³ = 9879239 is a prime.

It is a super-2 number, since 2×9887431² = 195522583559522, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9887441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943715 + 4943716.

It is an arithmetic number, because the mean of its divisors is an integer number (4943716).

Almost surely, 2^9887431 is an apocalyptic number.

9887431 is a deficient number, since it is larger than the sum of its proper divisors (1).

9887431 is an equidigital number, since it uses as much as digits as its factorization.

9887431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 9887431 is about 3144.4285649383. The cubic root of 9887431 is about 214.6320079693.

The spelling of 9887431 in words is "nine million, eight hundred eighty-seven thousand, four hundred thirty-one".