213924129 has 4 divisors (see below), whose sum is σ = 285232176. Its totient is φ = 142616084.

The previous prime is 213924103. The next prime is 213924143. The reversal of 213924129 is 921429312.

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 213924129 - 2¹¹ = 213922081 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213924129.

It is not an unprimeable number, because it can be changed into a prime (213924169) 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, 35654019 + ... + 35654024.

It is an arithmetic number, because the mean of its divisors is an integer number (71308044).

Almost surely, 2^213924129 is an apocalyptic number.

It is an amenable number.

213924129 is a deficient number, since it is larger than the sum of its proper divisors (71308047).

213924129 is an equidigital number, since it uses as much as digits as its factorization.

213924129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71308046.

The product of its digits is 7776, while the sum is 33.

The square root of 213924129 is about 14626.1453910454. The cubic root of 213924129 is about 598.0717066692.

The spelling of 213924129 in words is "two hundred thirteen million, nine hundred twenty-four thousand, one hundred twenty-nine".