1698434 has 4 divisors (see below), whose sum is σ = 2547654. Its totient is φ = 849216.

The previous prime is 1698427. The next prime is 1698449. The reversal of 1698434 is 4348961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4348961 = 887 ⋅4903.

It can be written as a sum of positive squares in only one way, i.e., 1697809 + 625 = 1303^2 + 25^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1698394 and 1698403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424607 + ... + 424610.

2^1698434 is an apocalyptic number.

1698434 is a deficient number, since it is larger than the sum of its proper divisors (849220).

1698434 is an equidigital number, since it uses as much as digits as its factorization.

1698434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849219.

The product of its digits is 20736, while the sum is 35.

The square root of 1698434 is about 1303.2398090912. The cubic root of 1698434 is about 119.3116609797.

The spelling of 1698434 in words is "one million, six hundred ninety-eight thousand, four hundred thirty-four".