213849797 has 4 divisors (see below), whose sum is σ = 244399776. Its totient is φ = 183299820.

The previous prime is 213849787. The next prime is 213849827. The reversal of 213849797 is 797948312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213849797 - 2¹⁰ = 213848773 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 (213849737) 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, 15274979 + ... + 15274992.

It is an arithmetic number, because the mean of its divisors is an integer number (61099944).

Almost surely, 2^213849797 is an apocalyptic number.

It is an amenable number.

213849797 is a deficient number, since it is larger than the sum of its proper divisors (30549979).

213849797 is an equidigital number, since it uses as much as digits as its factorization.

213849797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30549978.

The product of its digits is 762048, while the sum is 50.

The square root of 213849797 is about 14623.6041043239. The cubic root of 213849797 is about 598.0024281882.

The spelling of 213849797 in words is "two hundred thirteen million, eight hundred forty-nine thousand, seven hundred ninety-seven".