1009997 has 2 divisors, whose sum is σ = 1009998. Its totient is φ = 1009996.

The previous prime is 1009993. The next prime is 1010003. The reversal of 1009997 is 7999001.

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., 872356 + 137641 = 934^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009997 - 2² = 1009993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504998 + 504999.

It is an arithmetic number, because the mean of its divisors is an integer number (504999).

2^1009997 is an apocalyptic number.

It is an amenable number.

1009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009997 is an equidigital number, since it uses as much as digits as its factorization.

1009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1009997 is about 1004.9860695552. The cubic root of 1009997 is about 100.3321290153.

The spelling of 1009997 in words is "one million, nine thousand, nine hundred ninety-seven".