1388382131 has 2 divisors, whose sum is σ = 1388382132. Its totient is φ = 1388382130.

The previous prime is 1388382091. The next prime is 1388382133. The reversal of 1388382131 is 1312838831.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1312838831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388382131 - 2¹⁰ = 1388381107 is a prime.

It is a super-2 number, since 2×1388382131² = 3855209883360202322, which contains 22 as substring.

Together with 1388382133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1388382133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694191065 + 694191066.

It is an arithmetic number, because the mean of its divisors is an integer number (694191066).

Almost surely, 2^1388382131 is an apocalyptic number.

1388382131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388382131 is an equidigital number, since it uses as much as digits as its factorization.

1388382131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 1388382131 is about 37261.0001341886. Note that the first 3 decimals coincide. The cubic root of 1388382131 is about 1115.5858707919.

The spelling of 1388382131 in words is "one billion, three hundred eighty-eight million, three hundred eighty-two thousand, one hundred thirty-one".