213712349 has 4 divisors (see below), whose sum is σ = 213752736. Its totient is φ = 213671964.

The previous prime is 213712319. The next prime is 213712363. The reversal of 213712349 is 943217312.

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 a de Polignac number, because none of the positive numbers 2^k-213712349 is a prime.

It is a super-3 number, since 3×213712349³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213712319) 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, 10799 + ... + 23324.

It is an arithmetic number, because the mean of its divisors is an integer number (53438184).

Almost surely, 2^213712349 is an apocalyptic number.

It is an amenable number.

213712349 is a deficient number, since it is larger than the sum of its proper divisors (40387).

213712349 is an equidigital number, since it uses as much as digits as its factorization.

213712349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40386.

The product of its digits is 9072, while the sum is 32.

The square root of 213712349 is about 14618.9038234746. The cubic root of 213712349 is about 597.8742823980.

The spelling of 213712349 in words is "two hundred thirteen million, seven hundred twelve thousand, three hundred forty-nine".