213698694899 has 4 divisors (see below), whose sum is σ = 213744944640. Its totient is φ = 213652445160.

The previous prime is 213698694757. The next prime is 213698694919. The reversal of 213698694899 is 998496896312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213698694899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213698694499) 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, 23117939 + ... + 23127180.

It is an arithmetic number, because the mean of its divisors is an integer number (53436236160).

Almost surely, 2^213698694899 is an apocalyptic number.

213698694899 is a deficient number, since it is larger than the sum of its proper divisors (46249741).

213698694899 is an equidigital number, since it uses as much as digits as its factorization.

213698694899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46249740.

The product of its digits is 362797056, while the sum is 74.

The spelling of 213698694899 in words is "two hundred thirteen billion, six hundred ninety-eight million, six hundred ninety-four thousand, eight hundred ninety-nine".