13897387769 has 4 divisors (see below), whose sum is σ = 14125213860. Its totient is φ = 13669561680.

The previous prime is 13897387741. The next prime is 13897387789. The reversal of 13897387769 is 96778379831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96778379831 = 7 ⋅13825482833.

It can be written as a sum of positive squares in 2 ways, for example, as 2229067369 + 11668320400 = 47213^2 + 108020^2 .

It is a cyclic number.

It is not a de Polignac number, because 13897387769 - 2²⁴ = 13880610553 is a prime.

It is a super-2 number, since 2×13897387769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13897387699 and 13897387708.

It is not an unprimeable number, because it can be changed into a prime (13897387789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113912954 + ... + 113913075.

It is an arithmetic number, because the mean of its divisors is an integer number (3531303465).

Almost surely, 2^13897387769 is an apocalyptic number.

It is an amenable number.

13897387769 is a deficient number, since it is larger than the sum of its proper divisors (227826091).

13897387769 is an equidigital number, since it uses as much as digits as its factorization.

13897387769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227826090.

The product of its digits is 96018048, while the sum is 68.

The spelling of 13897387769 in words is "thirteen billion, eight hundred ninety-seven million, three hundred eighty-seven thousand, seven hundred sixty-nine".