9688729391 has 16 divisors (see below), whose sum is σ = 10651683840. Its totient is φ = 8739731520.

The previous prime is 9688729373. The next prime is 9688729397. The reversal of 9688729391 is 1939278869.

It is a cyclic number.

It is not a de Polignac number, because 9688729391 - 2¹⁴ = 9688713007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9688729397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761480 + ... + 774098.

It is an arithmetic number, because the mean of its divisors is an integer number (665730240).

Almost surely, 2^9688729391 is an apocalyptic number.

9688729391 is a deficient number, since it is larger than the sum of its proper divisors (962954449).

9688729391 is a wasteful number, since it uses less digits than its factorization.

9688729391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13166.

The product of its digits is 11757312, while the sum is 62.

The square root of 9688729391 is about 98431.3435395454. The cubic root of 9688729391 is about 2131.8449186976.

The spelling of 9688729391 in words is "nine billion, six hundred eighty-eight million, seven hundred twenty-nine thousand, three hundred ninety-one".