3912219893 has 2 divisors, whose sum is σ = 3912219894. Its totient is φ = 3912219892.

The previous prime is 3912219881. The next prime is 3912219907. The reversal of 3912219893 is 3989122193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3129507364 + 782712529 = 55942^2 + 27977^2 .

It is a cyclic number.

It is not a de Polignac number, because 3912219893 - 2⁸ = 3912219637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3912219823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956109946 + 1956109947.

It is an arithmetic number, because the mean of its divisors is an integer number (1956109947).

Almost surely, 2^3912219893 is an apocalyptic number.

It is an amenable number.

3912219893 is a deficient number, since it is larger than the sum of its proper divisors (1).

3912219893 is an equidigital number, since it uses as much as digits as its factorization.

3912219893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 3912219893 is about 62547.7409104438. The cubic root of 3912219893 is about 1575.7032073418.

The spelling of 3912219893 in words is "three billion, nine hundred twelve million, two hundred nineteen thousand, eight hundred ninety-three".