1338618629 has 2 divisors, whose sum is σ = 1338618630. Its totient is φ = 1338618628.

The previous prime is 1338618577. The next prime is 1338618637. The reversal of 1338618629 is 9268168331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190388004 + 148230625 = 34502^2 + 12175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338618629 - 2¹⁶ = 1338553093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338618649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669309314 + 669309315.

It is an arithmetic number, because the mean of its divisors is an integer number (669309315).

Almost surely, 2^1338618629 is an apocalyptic number.

It is an amenable number.

1338618629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338618629 is an equidigital number, since it uses as much as digits as its factorization.

1338618629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 1338618629 is about 36587.1374802676. The cubic root of 1338618629 is about 1102.0948040590.

The spelling of 1338618629 in words is "one billion, three hundred thirty-eight million, six hundred eighteen thousand, six hundred twenty-nine".