997744001 has 2 divisors, whose sum is σ = 997744002. Its totient is φ = 997744000.

The previous prime is 997743983. The next prime is 997744057. The reversal of 997744001 is 100447799.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979690000 + 18054001 = 31300^2 + 4249^2 .

It is an emirp because it is prime and its reverse (100447799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997744001 - 2¹⁸ = 997481857 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 997744001.

It is not a weakly prime, because it can be changed into another prime (997743001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498872000 + 498872001.

It is an arithmetic number, because the mean of its divisors is an integer number (498872001).

Almost surely, 2^997744001 is an apocalyptic number.

It is an amenable number.

997744001 is a deficient number, since it is larger than the sum of its proper divisors (1).

997744001 is an equidigital number, since it uses as much as digits as its factorization.

997744001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 997744001 is about 31587.0859846235. The cubic root of 997744001 is about 999.2474341200.

The spelling of 997744001 in words is "nine hundred ninety-seven million, seven hundred forty-four thousand, one".