9742218931 has 2 divisors, whose sum is σ = 9742218932. Its totient is φ = 9742218930.

The previous prime is 9742218929. The next prime is 9742218943. The reversal of 9742218931 is 1398122479.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9742218931 - 2¹ = 9742218929 is a prime.

It is a super-2 number, since 2×9742218931² (a number of 21 digits) contains 22 as substring.

Together with 9742218929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9742218911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4871109465 + 4871109466.

It is an arithmetic number, because the mean of its divisors is an integer number (4871109466).

Almost surely, 2^9742218931 is an apocalyptic number.

9742218931 is a deficient number, since it is larger than the sum of its proper divisors (1).

9742218931 is an equidigital number, since it uses as much as digits as its factorization.

9742218931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 9742218931 is about 98702.6794519784. The cubic root of 9742218931 is about 2135.7608844390.

The spelling of 9742218931 in words is "nine billion, seven hundred forty-two million, two hundred eighteen thousand, nine hundred thirty-one".