1694474893 has 2 divisors, whose sum is σ = 1694474894. Its totient is φ = 1694474892.

The previous prime is 1694474863. The next prime is 1694474909. The reversal of 1694474893 is 3984744961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1409101444 + 285373449 = 37538^2 + 16893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1694474893 is a prime.

It is a super-2 number, since 2×1694474893² = 5742490326014722898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1694474863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847237446 + 847237447.

It is an arithmetic number, because the mean of its divisors is an integer number (847237447).

Almost surely, 2^1694474893 is an apocalyptic number.

It is an amenable number.

1694474893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1694474893 is an equidigital number, since it uses as much as digits as its factorization.

1694474893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The square root of 1694474893 is about 41163.9999635604. Note that the first 4 decimals coincide. The cubic root of 1694474893 is about 1192.1888234890.

The spelling of 1694474893 in words is "one billion, six hundred ninety-four million, four hundred seventy-four thousand, eight hundred ninety-three".