1388169143 has 4 divisors (see below), whose sum is σ = 1388292048. Its totient is φ = 1388046240.

The previous prime is 1388169137. The next prime is 1388169161. The reversal of 1388169143 is 3419618831.

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 1388169143 - 2¹⁸ = 1387906999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388169094 and 1388169103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388169113) 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, 42578 + ... + 67743.

It is an arithmetic number, because the mean of its divisors is an integer number (347073012).

Almost surely, 2^1388169143 is an apocalyptic number.

1388169143 is a deficient number, since it is larger than the sum of its proper divisors (122905).

1388169143 is a wasteful number, since it uses less digits than its factorization.

1388169143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122904.

The product of its digits is 124416, while the sum is 44.

The square root of 1388169143 is about 37258.1419692394. The cubic root of 1388169143 is about 1115.5288215235.

The spelling of 1388169143 in words is "one billion, three hundred eighty-eight million, one hundred sixty-nine thousand, one hundred forty-three".