321145264397 has 2 divisors, whose sum is σ = 321145264398. Its totient is φ = 321145264396.

The previous prime is 321145264393. The next prime is 321145264411. The reversal of 321145264397 is 793462541123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318350979076 + 2794285321 = 564226^2 + 52861^2 .

It is a cyclic number.

It is not a de Polignac number, because 321145264397 - 2² = 321145264393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321145264393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160572632198 + 160572632199.

It is an arithmetic number, because the mean of its divisors is an integer number (160572632199).

Almost surely, 2^321145264397 is an apocalyptic number.

It is an amenable number.

321145264397 is a deficient number, since it is larger than the sum of its proper divisors (1).

321145264397 is an equidigital number, since it uses as much as digits as its factorization.

321145264397 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 spelling of 321145264397 in words is "three hundred twenty-one billion, one hundred forty-five million, two hundred sixty-four thousand, three hundred ninety-seven".