213428743 has 4 divisors (see below), whose sum is σ = 232831368. Its totient is φ = 194026120.

The previous prime is 213428741. The next prime is 213428771. The reversal of 213428743 is 347824312.

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

It is a cyclic number.

It is not a de Polignac number, because 213428743 - 2¹ = 213428741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213428699 and 213428708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213428741) 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, 9701296 + ... + 9701317.

It is an arithmetic number, because the mean of its divisors is an integer number (58207842).

Almost surely, 2^213428743 is an apocalyptic number.

213428743 is a deficient number, since it is larger than the sum of its proper divisors (19402625).

213428743 is a wasteful number, since it uses less digits than its factorization.

213428743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19402624.

The product of its digits is 32256, while the sum is 34.

The square root of 213428743 is about 14609.2006283711. The cubic root of 213428743 is about 597.6096965426.

The spelling of 213428743 in words is "two hundred thirteen million, four hundred twenty-eight thousand, seven hundred forty-three".