996408997 has 2 divisors, whose sum is σ = 996408998. Its totient is φ = 996408996.

The previous prime is 996408979. The next prime is 996409031. The reversal of 996408997 is 799804699.

Together with previous prime (996408979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768731076 + 227677921 = 27726^2 + 15089^2 .

It is a cyclic number.

It is not a de Polignac number, because 996408997 - 2⁷ = 996408869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996408797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498204498 + 498204499.

It is an arithmetic number, because the mean of its divisors is an integer number (498204499).

Almost surely, 2^996408997 is an apocalyptic number.

It is an amenable number.

996408997 is a deficient number, since it is larger than the sum of its proper divisors (1).

996408997 is an equidigital number, since it uses as much as digits as its factorization.

996408997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The square root of 996408997 is about 31565.9467939740. The cubic root of 996408997 is about 998.8015633233.

The spelling of 996408997 in words is "nine hundred ninety-six million, four hundred eight thousand, nine hundred ninety-seven".