321345487 has 2 divisors, whose sum is σ = 321345488. Its totient is φ = 321345486.

The previous prime is 321345463. The next prime is 321345527. The reversal of 321345487 is 784543123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321345487 - 2⁷ = 321345359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321345587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160672743 + 160672744.

It is an arithmetic number, because the mean of its divisors is an integer number (160672744).

Almost surely, 2^321345487 is an apocalyptic number.

321345487 is a deficient number, since it is larger than the sum of its proper divisors (1).

321345487 is an equidigital number, since it uses as much as digits as its factorization.

321345487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 321345487 is about 17926.1118762547. Note that the first 3 decimals coincide. The cubic root of 321345487 is about 684.9476842138.

The spelling of 321345487 in words is "three hundred twenty-one million, three hundred forty-five thousand, four hundred eighty-seven".