921632769 has 8 divisors (see below), whose sum is σ = 1365381920. Its totient is φ = 614421828.

The previous prime is 921632681. The next prime is 921632797. The reversal of 921632769 is 967236129.

It is a happy number.

921632769 is a `hidden beast` number, since 9 + 2 + 1 + 632 + 7 + 6 + 9 = 666.

It is not a de Polignac number, because 921632769 - 2⁸ = 921632513 is a prime.

It is a super-2 number, since 2×921632769² = 1698813921789214722, which contains 22 as substring.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (921632669) 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, 17067247 + ... + 17067300.

It is an arithmetic number, because the mean of its divisors is an integer number (170672740).

It is a Proth number, since it is equal to 14063 ⋅ 2¹⁶ + 1 and 14063 < 2¹⁶.

Almost surely, 2^921632769 is an apocalyptic number.

It is an amenable number.

921632769 is a deficient number, since it is larger than the sum of its proper divisors (443749151).

921632769 is a wasteful number, since it uses less digits than its factorization.

921632769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34134556 (or 34134550 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 921632769 is about 30358.4052446765. The cubic root of 921632769 is about 973.1638531641.

The spelling of 921632769 in words is "nine hundred twenty-one million, six hundred thirty-two thousand, seven hundred sixty-nine".