213667994 has 8 divisors (see below), whose sum is σ = 325756308. Its totient is φ = 105082560.

The previous prime is 213667991. The next prime is 213667997. The reversal of 213667994 is 499766312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213667991) and next prime (213667997).

It can be written as a sum of positive squares in 2 ways, for example, as 206985769 + 6682225 = 14387^2 + 2585^2 .

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

It is not an unprimeable number, because it can be changed into a prime (213667991) 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 3 ways as a sum of consecutive naturals, for example, 875567 + ... + 875810.

Almost surely, 2^213667994 is an apocalyptic number.

213667994 is a deficient number, since it is larger than the sum of its proper divisors (112088314).

213667994 is a wasteful number, since it uses less digits than its factorization.

213667994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751440.

The product of its digits is 489888, while the sum is 47.

The square root of 213667994 is about 14617.3867021434. The cubic root of 213667994 is about 597.8329175311.

The spelling of 213667994 in words is "two hundred thirteen million, six hundred sixty-seven thousand, nine hundred ninety-four".