213991699 has 8 divisors (see below), whose sum is σ = 238505040. Its totient is φ = 190803456.

The previous prime is 213991697. The next prime is 213991703. The reversal of 213991699 is 996199312.

213991699 = 222² + 223² + ... + 867².

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 213991699 - 2¹ = 213991697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213991691) 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, 330934 + ... + 331579.

It is an arithmetic number, because the mean of its divisors is an integer number (29813130).

Almost surely, 2^213991699 is an apocalyptic number.

213991699 is a deficient number, since it is larger than the sum of its proper divisors (24513341).

213991699 is a wasteful number, since it uses less digits than its factorization.

213991699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662549.

The product of its digits is 236196, while the sum is 49.

The square root of 213991699 is about 14628.4551132374. The cubic root of 213991699 is about 598.1346689467.

The spelling of 213991699 in words is "two hundred thirteen million, nine hundred ninety-one thousand, six hundred ninety-nine".