9807138941 has 2 divisors, whose sum is σ = 9807138942. Its totient is φ = 9807138940.

The previous prime is 9807138899. The next prime is 9807138947. The reversal of 9807138941 is 1498317089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9191056900 + 616082041 = 95870^2 + 24821^2 .

It is a cyclic number.

It is not a de Polignac number, because 9807138941 - 2⁶ = 9807138877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9807138941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9807138947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4903569470 + 4903569471.

It is an arithmetic number, because the mean of its divisors is an integer number (4903569471).

Almost surely, 2^9807138941 is an apocalyptic number.

It is an amenable number.

9807138941 is a deficient number, since it is larger than the sum of its proper divisors (1).

9807138941 is an equidigital number, since it uses as much as digits as its factorization.

9807138941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 9807138941 is about 99030.9998990215. Note that the first 3 decimals coincide. The cubic root of 9807138941 is about 2140.4944661259.

The spelling of 9807138941 in words is "nine billion, eight hundred seven million, one hundred thirty-eight thousand, nine hundred forty-one".