12401939689 has 2 divisors, whose sum is σ = 12401939690. Its totient is φ = 12401939688.

The previous prime is 12401939647. The next prime is 12401939699. The reversal of 12401939689 is 98693910421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11775939289 + 626000400 = 108517^2 + 25020^2 .

It is a cyclic number.

It is not a de Polignac number, because 12401939689 - 2²⁹ = 11865068777 is a prime.

It is not a weakly prime, because it can be changed into another prime (12401939629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200969844 + 6200969845.

It is an arithmetic number, because the mean of its divisors is an integer number (6200969845).

Almost surely, 2^12401939689 is an apocalyptic number.

It is an amenable number.

12401939689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12401939689 is an equidigital number, since it uses as much as digits as its factorization.

12401939689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 12401939689 in words is "twelve billion, four hundred one million, nine hundred thirty-nine thousand, six hundred eighty-nine".