213927149 has 4 divisors (see below), whose sum is σ = 214188540. Its totient is φ = 213665760.

The previous prime is 213927143. The next prime is 213927151. The reversal of 213927149 is 941729312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37515625 + 176411524 = 6125^2 + 13282^2 .

It is a cyclic number.

It is not a de Polignac number, because 213927149 - 2⁸ = 213926893 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 (213927143) 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, 129464 + ... + 131105.

It is an arithmetic number, because the mean of its divisors is an integer number (53547135).

Almost surely, 2^213927149 is an apocalyptic number.

It is an amenable number.

213927149 is a deficient number, since it is larger than the sum of its proper divisors (261391).

213927149 is an equidigital number, since it uses as much as digits as its factorization.

213927149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261390.

The product of its digits is 27216, while the sum is 38.

The square root of 213927149 is about 14626.2486304589. The cubic root of 213927149 is about 598.0745210128.

The spelling of 213927149 in words is "two hundred thirteen million, nine hundred twenty-seven thousand, one hundred forty-nine".