213292749 has 4 divisors (see below), whose sum is σ = 284390336. Its totient is φ = 142195164.

The previous prime is 213292747. The next prime is 213292757. The reversal of 213292749 is 947292312.

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 not a de Polignac number, because 213292749 - 2¹ = 213292747 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 (213292747) 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, 35548789 + ... + 35548794.

It is an arithmetic number, because the mean of its divisors is an integer number (71097584).

Almost surely, 2^213292749 is an apocalyptic number.

It is an amenable number.

213292749 is a deficient number, since it is larger than the sum of its proper divisors (71097587).

213292749 is an equidigital number, since it uses as much as digits as its factorization.

213292749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71097586.

The product of its digits is 54432, while the sum is 39.

The square root of 213292749 is about 14604.5454910449. The cubic root of 213292749 is about 597.4827398829.

The spelling of 213292749 in words is "two hundred thirteen million, two hundred ninety-two thousand, seven hundred forty-nine".