1697243231 has 2 divisors, whose sum is σ = 1697243232. Its totient is φ = 1697243230.

The previous prime is 1697243173. The next prime is 1697243279. The reversal of 1697243231 is 1323427961.

It is a strong prime.

It is an emirp because it is prime and its reverse (1323427961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1697243231 - 2¹⁴ = 1697226847 is a prime.

It is a super-2 number, since 2×1697243231² = 5761269170350638722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1697243281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848621615 + 848621616.

It is an arithmetic number, because the mean of its divisors is an integer number (848621616).

Almost surely, 2^1697243231 is an apocalyptic number.

1697243231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697243231 is an equidigital number, since it uses as much as digits as its factorization.

1697243231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 1697243231 is about 41197.6119574909. The cubic root of 1697243231 is about 1192.8377139781.

The spelling of 1697243231 in words is "one billion, six hundred ninety-seven million, two hundred forty-three thousand, two hundred thirty-one".