213909899 has 8 divisors (see below), whose sum is σ = 244593888. Its totient is φ = 183257280.

The previous prime is 213909893. The next prime is 213909911. The reversal of 213909899 is 998909312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213909899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213909893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9269 + ... + 22665.

It is an arithmetic number, because the mean of its divisors is an integer number (30574236).

Almost surely, 2^213909899 is an apocalyptic number.

213909899 is a deficient number, since it is larger than the sum of its proper divisors (30683989).

213909899 is a wasteful number, since it uses less digits than its factorization.

213909899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15685.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 213909899 is about 14625.6589253271. The cubic root of 213909899 is about 598.0584453490.

The spelling of 213909899 in words is "two hundred thirteen million, nine hundred nine thousand, eight hundred ninety-nine".