269472138491 has 2 divisors, whose sum is σ = 269472138492. Its totient is φ = 269472138490.

The previous prime is 269472138469. The next prime is 269472138553. The reversal of 269472138491 is 194831274962.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-269472138491 is a prime.

It is not a weakly prime, because it can be changed into another prime (269472131491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134736069245 + 134736069246.

It is an arithmetic number, because the mean of its divisors is an integer number (134736069246).

Almost surely, 2^269472138491 is an apocalyptic number.

269472138491 is a deficient number, since it is larger than the sum of its proper divisors (1).

269472138491 is an equidigital number, since it uses as much as digits as its factorization.

269472138491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The spelling of 269472138491 in words is "two hundred sixty-nine billion, four hundred seventy-two million, one hundred thirty-eight thousand, four hundred ninety-one".