9426991109 has 2 divisors, whose sum is σ = 9426991110. Its totient is φ = 9426991108.

The previous prime is 9426991087. The next prime is 9426991139. The reversal of 9426991109 is 9011996249.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8378656225 + 1048334884 = 91535^2 + 32378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9426991109 is a prime.

It is a super-2 number, since 2×9426991109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9426991139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4713495554 + 4713495555.

It is an arithmetic number, because the mean of its divisors is an integer number (4713495555).

Almost surely, 2^9426991109 is an apocalyptic number.

It is an amenable number.

9426991109 is a deficient number, since it is larger than the sum of its proper divisors (1).

9426991109 is an equidigital number, since it uses as much as digits as its factorization.

9426991109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 9426991109 is about 97092.6933862688. The cubic root of 9426991109 is about 2112.4723465166.

The spelling of 9426991109 in words is "nine billion, four hundred twenty-six million, nine hundred ninety-one thousand, one hundred nine".