1997351 has 2 divisors, whose sum is σ = 1997352. Its totient is φ = 1997350.

The previous prime is 1997341. The next prime is 1997407. The reversal of 1997351 is 1537991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997351 is a prime.

It is a super-2 number, since 2×1997351² = 7978822034402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998675 + 998676.

It is an arithmetic number, because the mean of its divisors is an integer number (998676).

2^1997351 is an apocalyptic number.

1997351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997351 is an equidigital number, since it uses as much as digits as its factorization.

1997351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505, while the sum is 35.

The square root of 1997351 is about 1413.2766891165. The cubic root of 1997351 is about 125.9364548984.

The spelling of 1997351 in words is "one million, nine hundred ninety-seven thousand, three hundred fifty-one".