321906463 has 4 divisors (see below), whose sum is σ = 323767368. Its totient is φ = 320045560.

The previous prime is 321906461. The next prime is 321906469. The reversal of 321906463 is 364609123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364609123 = 83 ⋅4392881.

It is a cyclic number.

It is not a de Polignac number, because 321906463 - 2¹ = 321906461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321906461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930193 + ... + 930538.

It is an arithmetic number, because the mean of its divisors is an integer number (80941842).

Almost surely, 2^321906463 is an apocalyptic number.

321906463 is a deficient number, since it is larger than the sum of its proper divisors (1860905).

321906463 is a wasteful number, since it uses less digits than its factorization.

321906463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860904.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 321906463 is about 17941.7519490155. The cubic root of 321906463 is about 685.3460258266.

The spelling of 321906463 in words is "three hundred twenty-one million, nine hundred six thousand, four hundred sixty-three".