13861398739 has 4 divisors (see below), whose sum is σ = 13902530824. Its totient is φ = 13820266656.

The previous prime is 13861398731. The next prime is 13861398769. The reversal of 13861398739 is 93789316831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93789316831 = 7 ⋅13398473833.

It is a cyclic number.

It is not a de Polignac number, because 13861398739 - 2³ = 13861398731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13861398731) 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, 20565537 + ... + 20566210.

It is an arithmetic number, because the mean of its divisors is an integer number (3475632706).

Almost surely, 2^13861398739 is an apocalyptic number.

13861398739 is a deficient number, since it is larger than the sum of its proper divisors (41132085).

13861398739 is an equidigital number, since it uses as much as digits as its factorization.

13861398739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41132084.

The product of its digits is 5878656, while the sum is 58.

The spelling of 13861398739 in words is "thirteen billion, eight hundred sixty-one million, three hundred ninety-eight thousand, seven hundred thirty-nine".