213428629 has 4 divisors (see below), whose sum is σ = 213520576. Its totient is φ = 213336684.

The previous prime is 213428623. The next prime is 213428671. The reversal of 213428629 is 926824312.

It is a happy number.

213428629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-213428629 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 (213428623) 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, 42399 + ... + 47164.

It is an arithmetic number, because the mean of its divisors is an integer number (53380144).

Almost surely, 2^213428629 is an apocalyptic number.

It is an amenable number.

213428629 is a deficient number, since it is larger than the sum of its proper divisors (91947).

213428629 is an equidigital number, since it uses as much as digits as its factorization.

213428629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91946.

The product of its digits is 41472, while the sum is 37.

The square root of 213428629 is about 14609.1967267198. The cubic root of 213428629 is about 597.6095901409.

The spelling of 213428629 in words is "two hundred thirteen million, four hundred twenty-eight thousand, six hundred twenty-nine".