321240797 has 2 divisors, whose sum is σ = 321240798. Its totient is φ = 321240796.

The previous prime is 321240761. The next prime is 321240833. The reversal of 321240797 is 797042123.

It is a balanced prime because it is at equal distance from previous prime (321240761) and next prime (321240833).

It can be written as a sum of positive squares in only one way, i.e., 170589721 + 150651076 = 13061^2 + 12274^2 .

It is a cyclic number.

It is not a de Polignac number, because 321240797 - 2²⁰ = 320192221 is a prime.

It is equal to p_17338607 and since 321240797 and 17338607 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321240727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160620398 + 160620399.

It is an arithmetic number, because the mean of its divisors is an integer number (160620399).

Almost surely, 2^321240797 is an apocalyptic number.

It is an amenable number.

321240797 is a deficient number, since it is larger than the sum of its proper divisors (1).

321240797 is an equidigital number, since it uses as much as digits as its factorization.

321240797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 321240797 is about 17923.1915963648. The cubic root of 321240797 is about 684.8732939138.

The spelling of 321240797 in words is "three hundred twenty-one million, two hundred forty thousand, seven hundred ninety-seven".