321789053 has 2 divisors, whose sum is σ = 321789054. Its totient is φ = 321789052.

The previous prime is 321789049. The next prime is 321789079. The reversal of 321789053 is 350987123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245016409 + 76772644 = 15653^2 + 8762^2 .

It is a cyclic number.

It is not a de Polignac number, because 321789053 - 2² = 321789049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321788998 and 321789016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321789043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160894526 + 160894527.

It is an arithmetic number, because the mean of its divisors is an integer number (160894527).

Almost surely, 2^321789053 is an apocalyptic number.

It is an amenable number.

321789053 is a deficient number, since it is larger than the sum of its proper divisors (1).

321789053 is an equidigital number, since it uses as much as digits as its factorization.

321789053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 321789053 is about 17938.4796735955. The cubic root of 321789053 is about 685.2626928598.

The spelling of 321789053 in words is "three hundred twenty-one million, seven hundred eighty-nine thousand, fifty-three".