321949487 has 2 divisors, whose sum is σ = 321949488. Its totient is φ = 321949486.

The previous prime is 321949393. The next prime is 321949513. The reversal of 321949487 is 784949123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321949487 - 2⁸ = 321949231 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 (321949687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160974743 + 160974744.

It is an arithmetic number, because the mean of its divisors is an integer number (160974744).

Almost surely, 2^321949487 is an apocalyptic number.

321949487 is a deficient number, since it is larger than the sum of its proper divisors (1).

321949487 is an equidigital number, since it uses as much as digits as its factorization.

321949487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 321949487 is about 17942.9509000053. The cubic root of 321949487 is about 685.3765574843.

The spelling of 321949487 in words is "three hundred twenty-one million, nine hundred forty-nine thousand, four hundred eighty-seven".