996721147 has 2 divisors, whose sum is σ = 996721148. Its totient is φ = 996721146.

The previous prime is 996721129. The next prime is 996721153. The reversal of 996721147 is 741127699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 996721147 - 2²⁷ = 862503419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 996721097 and 996721106.

It is not a weakly prime, because it can be changed into another prime (996721177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498360573 + 498360574.

It is an arithmetic number, because the mean of its divisors is an integer number (498360574).

Almost surely, 2^996721147 is an apocalyptic number.

996721147 is a deficient number, since it is larger than the sum of its proper divisors (1).

996721147 is an equidigital number, since it uses as much as digits as its factorization.

996721147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 996721147 is about 31570.8908173336. The cubic root of 996721147 is about 998.9058522774.

The spelling of 996721147 in words is "nine hundred ninety-six million, seven hundred twenty-one thousand, one hundred forty-seven".