212646399 has 8 divisors (see below), whose sum is σ = 324032640. Its totient is φ = 121512216.

The previous prime is 212646373. The next prime is 212646403. The reversal of 212646399 is 993646212.

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

It is not a de Polignac number, because 212646399 - 2⁵ = 212646367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212646399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212646199) 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 7 ways as a sum of consecutive naturals, for example, 5062989 + ... + 5063030.

It is an arithmetic number, because the mean of its divisors is an integer number (40504080).

Almost surely, 2^212646399 is an apocalyptic number.

212646399 is a deficient number, since it is larger than the sum of its proper divisors (111386241).

212646399 is a wasteful number, since it uses less digits than its factorization.

212646399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10126029.

The product of its digits is 139968, while the sum is 42.

The square root of 212646399 is about 14582.4003168203. The cubic root of 212646399 is about 596.8786035216.

The spelling of 212646399 in words is "two hundred twelve million, six hundred forty-six thousand, three hundred ninety-nine".