864279397 has 2 divisors, whose sum is σ = 864279398. Its totient is φ = 864279396.

The previous prime is 864279389. The next prime is 864279413. The reversal of 864279397 is 793972468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817616836 + 46662561 = 28594^2 + 6831^2 .

It is a cyclic number.

It is not a de Polignac number, because 864279397 - 2³ = 864279389 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 (864279347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432139698 + 432139699.

It is an arithmetic number, because the mean of its divisors is an integer number (432139699).

Almost surely, 2^864279397 is an apocalyptic number.

It is an amenable number.

864279397 is a deficient number, since it is larger than the sum of its proper divisors (1).

864279397 is an equidigital number, since it uses as much as digits as its factorization.

864279397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 55.

The square root of 864279397 is about 29398.6291687215. The cubic root of 864279397 is about 952.5432856469.

The spelling of 864279397 in words is "eight hundred sixty-four million, two hundred seventy-nine thousand, three hundred ninety-seven".