2163693997 has 2 divisors, whose sum is σ = 2163693998. Its totient is φ = 2163693996.

The previous prime is 2163693967. The next prime is 2163694033. The reversal of 2163693997 is 7993963612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1620384516 + 543309481 = 40254^2 + 23309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2163693997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2163693967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081846998 + 1081846999.

It is an arithmetic number, because the mean of its divisors is an integer number (1081846999).

Almost surely, 2^2163693997 is an apocalyptic number.

It is an amenable number.

2163693997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163693997 is an equidigital number, since it uses as much as digits as its factorization.

2163693997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 55.

The square root of 2163693997 is about 46515.5242580367. The cubic root of 2163693997 is about 1293.3972902014.

The spelling of 2163693997 in words is "two billion, one hundred sixty-three million, six hundred ninety-three thousand, nine hundred ninety-seven".