9942731 has 2 divisors, whose sum is σ = 9942732. Its totient is φ = 9942730.

The previous prime is 9942727. The next prime is 9942749. The reversal of 9942731 is 1372499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9942731 - 2² = 9942727 is a prime.

It is a super-2 number, since 2×9942731² = 197715799476722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9942691 and 9942700.

It is not a weakly prime, because it can be changed into another prime (9942701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971365 + 4971366.

It is an arithmetic number, because the mean of its divisors is an integer number (4971366).

Almost surely, 2^9942731 is an apocalyptic number.

9942731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942731 is an equidigital number, since it uses as much as digits as its factorization.

9942731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 9942731 is about 3153.2096346421. The cubic root of 9942731 is about 215.0314069857.

The spelling of 9942731 in words is "nine million, nine hundred forty-two thousand, seven hundred thirty-one".