269431397 has 2 divisors, whose sum is σ = 269431398. Its totient is φ = 269431396.

The previous prime is 269431333. The next prime is 269431399. The reversal of 269431397 is 793134962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248188516 + 21242881 = 15754^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 269431397 - 2⁶ = 269431333 is a prime.

Together with 269431399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (269431399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134715698 + 134715699.

It is an arithmetic number, because the mean of its divisors is an integer number (134715699).

Almost surely, 2^269431397 is an apocalyptic number.

It is an amenable number.

269431397 is a deficient number, since it is larger than the sum of its proper divisors (1).

269431397 is an equidigital number, since it uses as much as digits as its factorization.

269431397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 269431397 is about 16414.3655680017. The cubic root of 269431397 is about 645.8763777605.

The spelling of 269431397 in words is "two hundred sixty-nine million, four hundred thirty-one thousand, three hundred ninety-seven".