9661389429 has 8 divisors (see below), whose sum is σ = 12883210560. Its totient is φ = 6440247296.

The previous prime is 9661389389. The next prime is 9661389431. The reversal of 9661389429 is 9249831669.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9661389429 - 2¹² = 9661385333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661389029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135564 + ... + 194165.

It is an arithmetic number, because the mean of its divisors is an integer number (1610401320).

Almost surely, 2^9661389429 is an apocalyptic number.

It is an amenable number.

9661389429 is a deficient number, since it is larger than the sum of its proper divisors (3221821131).

9661389429 is a wasteful number, since it uses less digits than its factorization.

9661389429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339499.

The product of its digits is 5038848, while the sum is 57.

The square root of 9661389429 is about 98292.3670942968. The cubic root of 9661389429 is about 2129.8377938591.

The spelling of 9661389429 in words is "nine billion, six hundred sixty-one million, three hundred eighty-nine thousand, four hundred twenty-nine".