1338698917 has 2 divisors, whose sum is σ = 1338698918. Its totient is φ = 1338698916.

The previous prime is 1338698897. The next prime is 1338698939. The reversal of 1338698917 is 7198968331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726086916 + 612612001 = 26946^2 + 24751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338698917 - 2²⁷ = 1204481189 is a prime.

It is a super-2 number, since 2×1338698917² = 3584229580753945778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338690917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669349458 + 669349459.

It is an arithmetic number, because the mean of its divisors is an integer number (669349459).

Almost surely, 2^1338698917 is an apocalyptic number.

It is an amenable number.

1338698917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338698917 is an equidigital number, since it uses as much as digits as its factorization.

1338698917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 1338698917 is about 36588.2346800170. The cubic root of 1338698917 is about 1102.1168375236.

The spelling of 1338698917 in words is "one billion, three hundred thirty-eight million, six hundred ninety-eight thousand, nine hundred seventeen".