3985398749723 has 2 divisors, whose sum is σ = 3985398749724. Its totient is φ = 3985398749722.

The previous prime is 3985398749669. The next prime is 3985398749749. The reversal of 3985398749723 is 3279478935893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3985398749723 - 2⁸ = 3985398749467 is a prime.

It is not a weakly prime, because it can be changed into another prime (3985394749723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992699374861 + 1992699374862.

It is an arithmetic number, because the mean of its divisors is an integer number (1992699374862).

Almost surely, 2^{3985398749723} is an apocalyptic number.

3985398749723 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985398749723 is an equidigital number, since it uses as much as digits as its factorization.

3985398749723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2469035520, while the sum is 77.

The spelling of 3985398749723 in words is "three trillion, nine hundred eighty-five billion, three hundred ninety-eight million, seven hundred forty-nine thousand, seven hundred twenty-three".