996479821 has 2 divisors, whose sum is σ = 996479822. Its totient is φ = 996479820.

The previous prime is 996479801. The next prime is 996479863. The reversal of 996479821 is 128974699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 911194596 + 85285225 = 30186^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 996479821 - 2¹¹ = 996477773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996479801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498239910 + 498239911.

It is an arithmetic number, because the mean of its divisors is an integer number (498239911).

Almost surely, 2^996479821 is an apocalyptic number.

It is an amenable number.

996479821 is a deficient number, since it is larger than the sum of its proper divisors (1).

996479821 is an equidigital number, since it uses as much as digits as its factorization.

996479821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 996479821 is about 31567.0686158851. The cubic root of 996479821 is about 998.8252274499.

The spelling of 996479821 in words is "nine hundred ninety-six million, four hundred seventy-nine thousand, eight hundred twenty-one".