1393963673 has 2 divisors, whose sum is σ = 1393963674. Its totient is φ = 1393963672.

The previous prime is 1393963663. The next prime is 1393963699. The reversal of 1393963673 is 3763693931.

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., 990235024 + 403728649 = 31468^2 + 20093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393963673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1393963663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696981836 + 696981837.

It is an arithmetic number, because the mean of its divisors is an integer number (696981837).

Almost surely, 2^1393963673 is an apocalyptic number.

It is an amenable number.

1393963673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393963673 is an equidigital number, since it uses as much as digits as its factorization.

1393963673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 50.

The square root of 1393963673 is about 37335.8229184787. The cubic root of 1393963673 is about 1117.0788228422.

The spelling of 1393963673 in words is "one billion, three hundred ninety-three million, nine hundred sixty-three thousand, six hundred seventy-three".