1017997 has 2 divisors, whose sum is σ = 1017998. Its totient is φ = 1017996.

The previous prime is 1017959. The next prime is 1018007. The reversal of 1017997 is 7997101.

It is a happy number.

1017997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 276676 = 861^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1017997 - 2¹⁹ = 493709 is a prime.

1017997 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1017097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508998 + 508999.

It is an arithmetic number, because the mean of its divisors is an integer number (508999).

2^1017997 is an apocalyptic number.

It is an amenable number.

1017997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017997 is an equidigital number, since it uses as much as digits as its factorization.

1017997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 1017997 is about 1008.9583737697. The cubic root of 1017997 is about 100.5963367558.

The spelling of 1017997 in words is "one million, seventeen thousand, nine hundred ninety-seven".