9921363969 has 64 divisors (see below), whose sum is σ = 15736504320. Its totient is φ = 5493096000.

The previous prime is 9921363943. The next prime is 9921364003. The reversal of 9921363969 is 9693631299.

It is not a de Polignac number, because 9921363969 - 2⁹ = 9921363457 is a prime.

It is a super-2 number, since 2×9921363969² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9921363919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6743904 + ... + 6745374.

It is an arithmetic number, because the mean of its divisors is an integer number (245882880).

It is a Proth number, since it is equal to 37847 ⋅ 2¹⁸ + 1 and 37847 < 2¹⁸.

Almost surely, 2^9921363969 is an apocalyptic number.

It is an amenable number.

9921363969 is a deficient number, since it is larger than the sum of its proper divisors (5815140351).

9921363969 is a wasteful number, since it uses less digits than its factorization.

9921363969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882.

The product of its digits is 4251528, while the sum is 57.

The square root of 9921363969 is about 99606.0438377110. The cubic root of 9921363969 is about 2148.7726161247.

The spelling of 9921363969 in words is "nine billion, nine hundred twenty-one million, three hundred sixty-three thousand, nine hundred sixty-nine".