1894434869 has 2 divisors, whose sum is σ = 1894434870. Its totient is φ = 1894434868.

The previous prime is 1894434853. The next prime is 1894434901. The reversal of 1894434869 is 9684344981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1621028644 + 273406225 = 40262^2 + 16535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894434869 - 2⁴ = 1894434853 is a prime.

It is a super-2 number, since 2×1894434869² = 7177766945766094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1894434469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947217434 + 947217435.

It is an arithmetic number, because the mean of its divisors is an integer number (947217435).

Almost surely, 2^1894434869 is an apocalyptic number.

It is an amenable number.

1894434869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894434869 is an equidigital number, since it uses as much as digits as its factorization.

1894434869 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1894434869 is about 43525.1061917142. The cubic root of 1894434869 is about 1237.3518906374.

The spelling of 1894434869 in words is "one billion, eight hundred ninety-four million, four hundred thirty-four thousand, eight hundred sixty-nine".