538969397 has 2 divisors, whose sum is σ = 538969398. Its totient is φ = 538969396.

The previous prime is 538969393. The next prime is 538969421. The reversal of 538969397 is 793969835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534811876 + 4157521 = 23126^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 538969397 - 2² = 538969393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538969393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269484698 + 269484699.

It is an arithmetic number, because the mean of its divisors is an integer number (269484699).

Almost surely, 2^538969397 is an apocalyptic number.

It is an amenable number.

538969397 is a deficient number, since it is larger than the sum of its proper divisors (1).

538969397 is an equidigital number, since it uses as much as digits as its factorization.

538969397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11022480, while the sum is 59.

The square root of 538969397 is about 23215.7144408696. The cubic root of 538969397 is about 813.8069019195.

The spelling of 538969397 in words is "five hundred thirty-eight million, nine hundred sixty-nine thousand, three hundred ninety-seven".