9925427731 has 2 divisors, whose sum is σ = 9925427732. Its totient is φ = 9925427730.

The previous prime is 9925427623. The next prime is 9925427737. The reversal of 9925427731 is 1377245299.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9925427731 - 2¹⁷ = 9925296659 is a prime.

It is a super-3 number, since 3×9925427731³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (9925427737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4962713865 + 4962713866.

It is an arithmetic number, because the mean of its divisors is an integer number (4962713866).

Almost surely, 2^9925427731 is an apocalyptic number.

9925427731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9925427731 is an equidigital number, since it uses as much as digits as its factorization.

9925427731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 9925427731 is about 99626.4409230803. The cubic root of 9925427731 is about 2149.0659530956.

The spelling of 9925427731 in words is "nine billion, nine hundred twenty-five million, four hundred twenty-seven thousand, seven hundred thirty-one".