9689885731 has 2 divisors, whose sum is σ = 9689885732. Its totient is φ = 9689885730.

The previous prime is 9689885659. The next prime is 9689885773. The reversal of 9689885731 is 1375889869.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9689885731 - 2¹⁹ = 9689361443 is a prime.

It is a super-2 number, since 2×9689885731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9689885831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844942865 + 4844942866.

It is an arithmetic number, because the mean of its divisors is an integer number (4844942866).

Almost surely, 2^9689885731 is an apocalyptic number.

9689885731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689885731 is an equidigital number, since it uses as much as digits as its factorization.

9689885731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 64.

The square root of 9689885731 is about 98437.2172046732. The cubic root of 9689885731 is about 2131.9297264982.

The spelling of 9689885731 in words is "nine billion, six hundred eighty-nine million, eight hundred eighty-five thousand, seven hundred thirty-one".