321142387 has 2 divisors, whose sum is σ = 321142388. Its totient is φ = 321142386.

The previous prime is 321142379. The next prime is 321142411. The reversal of 321142387 is 783241123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321142387 - 2³ = 321142379 is a prime.

It is not a weakly prime, because it can be changed into another prime (321142337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160571193 + 160571194.

It is an arithmetic number, because the mean of its divisors is an integer number (160571194).

Almost surely, 2^321142387 is an apocalyptic number.

321142387 is a deficient number, since it is larger than the sum of its proper divisors (1).

321142387 is an equidigital number, since it uses as much as digits as its factorization.

321142387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 321142387 is about 17920.4460602966. The cubic root of 321142387 is about 684.8033512986.

The spelling of 321142387 in words is "three hundred twenty-one million, one hundred forty-two thousand, three hundred eighty-seven".