9925811243 has 2 divisors, whose sum is σ = 9925811244. Its totient is φ = 9925811242.

The previous prime is 9925811239. The next prime is 9925811297. The reversal of 9925811243 is 3421185299.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9925811243 - 2² = 9925811239 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 9925811194 and 9925811203.

It is not a weakly prime, because it can be changed into another prime (9925811213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4962905621 + 4962905622.

It is an arithmetic number, because the mean of its divisors is an integer number (4962905622).

Almost surely, 2^9925811243 is an apocalyptic number.

9925811243 is a deficient number, since it is larger than the sum of its proper divisors (1).

9925811243 is an equidigital number, since it uses as much as digits as its factorization.

9925811243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 9925811243 is about 99628.3656545665. The cubic root of 9925811243 is about 2149.0936322375.

The spelling of 9925811243 in words is "nine billion, nine hundred twenty-five million, eight hundred eleven thousand, two hundred forty-three".