13990628939389 has 4 divisors (see below), whose sum is σ = 14027157997056. Its totient is φ = 13954099881724.

The previous prime is 13990628939381. The next prime is 13990628939467. The reversal of 13990628939389 is 98393982609931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13990628939389 - 2³ = 13990628939381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13990628939381) 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, 18264528259 + ... + 18264529024.

It is an arithmetic number, because the mean of its divisors is an integer number (3506789499264).

Almost surely, 2^{13990628939389} is an apocalyptic number.

It is an amenable number.

13990628939389 is a deficient number, since it is larger than the sum of its proper divisors (36529057667).

13990628939389 is an equidigital number, since it uses as much as digits as its factorization.

13990628939389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36529057666.

The product of its (nonzero) digits is 1224440064, while the sum is 79.

The spelling of 13990628939389 in words is "thirteen trillion, nine hundred ninety billion, six hundred twenty-eight million, nine hundred thirty-nine thousand, three hundred eighty-nine".