213974149 has 4 divisors (see below), whose sum is σ = 218950336. Its totient is φ = 208997964.

The previous prime is 213974147. The next prime is 213974161. The reversal of 213974149 is 941479312.

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 213974149 - 2¹ = 213974147 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 (213974147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2488029 + ... + 2488114.

It is an arithmetic number, because the mean of its divisors is an integer number (54737584).

Almost surely, 2^213974149 is an apocalyptic number.

It is an amenable number.

213974149 is a deficient number, since it is larger than the sum of its proper divisors (4976187).

213974149 is an equidigital number, since it uses as much as digits as its factorization.

213974149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976186.

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

The square root of 213974149 is about 14627.8552426526. The cubic root of 213974149 is about 598.1183169878.

The spelling of 213974149 in words is "two hundred thirteen million, nine hundred seventy-four thousand, one hundred forty-nine".