1894084693 has 2 divisors, whose sum is σ = 1894084694. Its totient is φ = 1894084692.

The previous prime is 1894084669. The next prime is 1894084811. The reversal of 1894084693 is 3964804981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1715782084 + 178302609 = 41422^2 + 13353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1894084693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1894084693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1894084663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947042346 + 947042347.

It is an arithmetic number, because the mean of its divisors is an integer number (947042347).

Almost surely, 2^1894084693 is an apocalyptic number.

It is an amenable number.

1894084693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894084693 is an equidigital number, since it uses as much as digits as its factorization.

1894084693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 1894084693 is about 43521.0833160205. The cubic root of 1894084693 is about 1237.2756466798.

The spelling of 1894084693 in words is "one billion, eight hundred ninety-four million, eighty-four thousand, six hundred ninety-three".