1338491873 has 2 divisors, whose sum is σ = 1338491874. Its totient is φ = 1338491872.

The previous prime is 1338491857. The next prime is 1338491911. The reversal of 1338491873 is 3781948331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779973184 + 558518689 = 27928^2 + 23633^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338491873 - 2⁴ = 1338491857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338491813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669245936 + 669245937.

It is an arithmetic number, because the mean of its divisors is an integer number (669245937).

Almost surely, 2^1338491873 is an apocalyptic number.

It is an amenable number.

1338491873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338491873 is an equidigital number, since it uses as much as digits as its factorization.

1338491873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 1338491873 is about 36585.4051911415. The cubic root of 1338491873 is about 1102.0600165710.

The spelling of 1338491873 in words is "one billion, three hundred thirty-eight million, four hundred ninety-one thousand, eight hundred seventy-three".