1388341840187 has 4 divisors (see below), whose sum is σ = 1388344911576. Its totient is φ = 1388338768800.

The previous prime is 1388341840157. The next prime is 1388341840189. The reversal of 1388341840187 is 7810481438831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1388341840187 - 2³² = 1384046872891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388341840189) 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, 709493 + ... + 1811094.

It is an arithmetic number, because the mean of its divisors is an integer number (347086227894).

Almost surely, 2^{1388341840187} is an apocalyptic number.

1388341840187 is a deficient number, since it is larger than the sum of its proper divisors (3071389).

1388341840187 is an equidigital number, since it uses as much as digits as its factorization.

1388341840187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071388.

The product of its (nonzero) digits is 4128768, while the sum is 56.

The spelling of 1388341840187 in words is "one trillion, three hundred eighty-eight billion, three hundred forty-one million, eight hundred forty thousand, one hundred eighty-seven".