1694434898 has 18 divisors (see below), whose sum is σ = 2753433189. Its totient is φ = 781697592.

The previous prime is 1694434871. The next prime is 1694434913. The reversal of 1694434898 is 8984344961.

It can be written as a sum of positive squares in 2 ways, for example, as 1448791969 + 245642929 = 38063^2 + 15673^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=29107.

It is a super-2 number, since 2×1694434898² = 5742219247120540808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 755663 + ... + 757901.

Almost surely, 2^1694434898 is an apocalyptic number.

1694434898 is a deficient number, since it is larger than the sum of its proper divisors (1058998291).

1694434898 is an frugal number, since it uses more digits than its factorization.

1694434898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506 (or 2254 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The square root of 1694434898 is about 41163.5141599937. The cubic root of 1694434898 is about 1192.1794435984.

The spelling of 1694434898 in words is "one billion, six hundred ninety-four million, four hundred thirty-four thousand, eight hundred ninety-eight".