1698131 has 2 divisors, whose sum is σ = 1698132. Its totient is φ = 1698130.

The previous prime is 1698127. The next prime is 1698133. The reversal of 1698131 is 1318961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1698131 - 2² = 1698127 is a prime.

It is a super-2 number, since 2×1698131² = 5767297786322, which contains 22 as substring.

Together with 1698133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1698094 and 1698103.

It is not a weakly prime, because it can be changed into another prime (1698133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849065 + 849066.

It is an arithmetic number, because the mean of its divisors is an integer number (849066).

2^1698131 is an apocalyptic number.

1698131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1698131 is an equidigital number, since it uses as much as digits as its factorization.

1698131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 1698131 is about 1303.1235551551. The cubic root of 1698131 is about 119.3045655056.

The spelling of 1698131 in words is "one million, six hundred ninety-eight thousand, one hundred thirty-one".