213353747687 has 4 divisors (see below), whose sum is σ = 213538791120. Its totient is φ = 213168704256.

The previous prime is 213353747683. The next prime is 213353747689. The reversal of 213353747687 is 786747353312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213353747687 - 2² = 213353747683 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 (213353747683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92519987 + ... + 92522292.

It is an arithmetic number, because the mean of its divisors is an integer number (53384697780).

Almost surely, 2^213353747687 is an apocalyptic number.

213353747687 is a deficient number, since it is larger than the sum of its proper divisors (185043433).

213353747687 is a wasteful number, since it uses less digits than its factorization.

213353747687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185043432.

The product of its digits is 17781120, while the sum is 56.

The spelling of 213353747687 in words is "two hundred thirteen billion, three hundred fifty-three million, seven hundred forty-seven thousand, six hundred eighty-seven".