213677693 has 8 divisors (see below), whose sum is σ = 217824600. Its totient is φ = 209551680.

The previous prime is 213677677. The next prime is 213677719. The reversal of 213677693 is 396776312.

It can be written as a sum of positive squares in 4 ways, for example, as 3485689 + 210192004 = 1867^2 + 14498^2 .

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 213677693 - 2⁴ = 213677677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213677603) 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, 16271 + ... + 26307.

It is an arithmetic number, because the mean of its divisors is an integer number (27228075).

Almost surely, 2^213677693 is an apocalyptic number.

It is an amenable number.

213677693 is a deficient number, since it is larger than the sum of its proper divisors (4146907).

213677693 is a wasteful number, since it uses less digits than its factorization.

213677693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447.

The product of its digits is 285768, while the sum is 44.

The square root of 213677693 is about 14617.7184608269. The cubic root of 213677693 is about 597.8419631750.

The spelling of 213677693 in words is "two hundred thirteen million, six hundred seventy-seven thousand, six hundred ninety-three".