9932912921 has 2 divisors, whose sum is σ = 9932912922. Its totient is φ = 9932912920.

The previous prime is 9932912897. The next prime is 9932912933. The reversal of 9932912921 is 1292192399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9932912896 + 25 = 99664^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 9932912921 - 2²² = 9928718617 is a prime.

It is not a weakly prime, because it can be changed into another prime (9932912981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4966456460 + 4966456461.

It is an arithmetic number, because the mean of its divisors is an integer number (4966456461).

Almost surely, 2^9932912921 is an apocalyptic number.

It is an amenable number.

9932912921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9932912921 is an equidigital number, since it uses as much as digits as its factorization.

9932912921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 47.

The square root of 9932912921 is about 99664.0001254214. Note that the first 3 decimals coincide. The cubic root of 9932912921 is about 2149.6060515631.

The spelling of 9932912921 in words is "nine billion, nine hundred thirty-two million, nine hundred twelve thousand, nine hundred twenty-one".