9996331421 has 2 divisors, whose sum is σ = 9996331422. Its totient is φ = 9996331420.

The previous prime is 9996331409. The next prime is 9996331427. The reversal of 9996331421 is 1241336999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8265355396 + 1730976025 = 90914^2 + 41605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9996331421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9996331427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998165710 + 4998165711.

It is an arithmetic number, because the mean of its divisors is an integer number (4998165711).

Almost surely, 2^9996331421 is an apocalyptic number.

It is an amenable number.

9996331421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996331421 is an equidigital number, since it uses as much as digits as its factorization.

9996331421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 47.

The square root of 9996331421 is about 99981.6554223824. The cubic root of 9996331421 is about 2154.1712006795.

The spelling of 9996331421 in words is "nine billion, nine hundred ninety-six million, three hundred thirty-one thousand, four hundred twenty-one".