1388161031 has 2 divisors, whose sum is σ = 1388161032. Its totient is φ = 1388161030.

The previous prime is 1388160971. The next prime is 1388161039. The reversal of 1388161031 is 1301618831.

It is a strong prime.

It is an emirp because it is prime and its reverse (1301618831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388161031 - 2⁶ = 1388160967 is a prime.

It is a super-2 number, since 2×1388161031² = 3853982095973965922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388161039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694080515 + 694080516.

It is an arithmetic number, because the mean of its divisors is an integer number (694080516).

Almost surely, 2^1388161031 is an apocalyptic number.

1388161031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388161031 is an equidigital number, since it uses as much as digits as its factorization.

1388161031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1388161031 is about 37258.0331069690. The cubic root of 1388161031 is about 1115.5266485924.

Adding to 1388161031 its reverse (1301618831), we get a palindrome (2689779862).

The spelling of 1388161031 in words is "one billion, three hundred eighty-eight million, one hundred sixty-one thousand, thirty-one".