1338280591 has 2 divisors, whose sum is σ = 1338280592. Its totient is φ = 1338280590.

The previous prime is 1338280501. The next prime is 1338280597. The reversal of 1338280591 is 1950828331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338280591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338280597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669140295 + 669140296.

It is an arithmetic number, because the mean of its divisors is an integer number (669140296).

Almost surely, 2^1338280591 is an apocalyptic number.

1338280591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338280591 is an equidigital number, since it uses as much as digits as its factorization.

1338280591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1338280591 is about 36582.5175596213. The cubic root of 1338280591 is about 1102.0020265047.

The spelling of 1338280591 in words is "one billion, three hundred thirty-eight million, two hundred eighty thousand, five hundred ninety-one".