921296129 has 8 divisors (see below), whose sum is σ = 992853120. Its totient is φ = 849837456.

The previous prime is 921296087. The next prime is 921296141. The reversal of 921296129 is 921692129.

It is a happy number.

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

It is not a de Polignac number, because 921296129 - 2¹⁶ = 921230593 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921296729) 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, 4499 + ... + 43160.

It is an arithmetic number, because the mean of its divisors is an integer number (124106640).

Almost surely, 2^921296129 is an apocalyptic number.

It is an amenable number.

921296129 is a deficient number, since it is larger than the sum of its proper divisors (71556991).

921296129 is a wasteful number, since it uses less digits than its factorization.

921296129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49159.

The product of its digits is 34992, while the sum is 41.

The square root of 921296129 is about 30352.8603100268. The cubic root of 921296129 is about 973.0453512379.

The spelling of 921296129 in words is "nine hundred twenty-one million, two hundred ninety-six thousand, one hundred twenty-nine".