264538397 has 2 divisors, whose sum is σ = 264538398. Its totient is φ = 264538396.

The previous prime is 264538357. The next prime is 264538409. The reversal of 264538397 is 793835462.

It is a happy number.

264538397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255168676 + 9369721 = 15974^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 264538397 - 2¹² = 264534301 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 (264538357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132269198 + 132269199.

It is an arithmetic number, because the mean of its divisors is an integer number (132269199).

Almost surely, 2^264538397 is an apocalyptic number.

It is an amenable number.

264538397 is a deficient number, since it is larger than the sum of its proper divisors (1).

264538397 is an equidigital number, since it uses as much as digits as its factorization.

264538397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 47.

The square root of 264538397 is about 16264.6363931076. The cubic root of 264538397 is about 641.9426625229.

The spelling of 264538397 in words is "two hundred sixty-four million, five hundred thirty-eight thousand, three hundred ninety-seven".