1697431 has 4 divisors (see below), whose sum is σ = 1729512. Its totient is φ = 1665352.

The previous prime is 1697419. The next prime is 1697453. The reversal of 1697431 is 1347961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1697431 - 2¹⁷ = 1566359 is a prime.

It is a super-2 number, since 2×1697431² = 5762543999522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1697393 and 1697402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1697401) 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 in 3 ways as a sum of consecutive naturals, for example, 15961 + ... + 16066.

It is an arithmetic number, because the mean of its divisors is an integer number (432378).

2^1697431 is an apocalyptic number.

1697431 is a deficient number, since it is larger than the sum of its proper divisors (32081).

1697431 is an equidigital number, since it uses as much as digits as its factorization.

1697431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32080.

The product of its digits is 4536, while the sum is 31.

The square root of 1697431 is about 1302.8549420407. The cubic root of 1697431 is about 119.2881700933.

It can be divided in two parts, 169743 and 1, that added together give a square (169744 = 412²).

The spelling of 1697431 in words is "one million, six hundred ninety-seven thousand, four hundred thirty-one".