213968399 has 8 divisors (see below), whose sum is σ = 217655760. Its totient is φ = 210312000.

The previous prime is 213968383. The next prime is 213968407. The reversal of 213968399 is 993869312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213968399 - 2⁴ = 213968383 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213968999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6419 + ... + 21659.

It is an arithmetic number, because the mean of its divisors is an integer number (27206970).

Almost surely, 2^213968399 is an apocalyptic number.

213968399 is a deficient number, since it is larger than the sum of its proper divisors (3687361).

213968399 is a wasteful number, since it uses less digits than its factorization.

213968399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15481.

The product of its digits is 629856, while the sum is 50.

The square root of 213968399 is about 14627.6586985067. The cubic root of 213968399 is about 598.1129593139.

The spelling of 213968399 in words is "two hundred thirteen million, nine hundred sixty-eight thousand, three hundred ninety-nine".