213697813 has 8 divisors (see below), whose sum is σ = 245178432. Its totient is φ = 182455296.

The previous prime is 213697789. The next prime is 213697873. The reversal of 213697813 is 318796312.

213697813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213697813 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 (213697873) 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, 57595 + ... + 61192.

It is an arithmetic number, because the mean of its divisors is an integer number (30647304).

Almost surely, 2^213697813 is an apocalyptic number.

It is an amenable number.

213697813 is a deficient number, since it is larger than the sum of its proper divisors (31480619).

213697813 is a wasteful number, since it uses less digits than its factorization.

213697813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119051.

The product of its digits is 54432, while the sum is 40.

The square root of 213697813 is about 14618.4066505211. The cubic root of 213697813 is about 597.8607269536.

The spelling of 213697813 in words is "two hundred thirteen million, six hundred ninety-seven thousand, eight hundred thirteen".