213790 has 8 divisors (see below), whose sum is σ = 384840. Its totient is φ = 85512.

The previous prime is 213751. The next prime is 213791. The reversal of 213790 is 97312.

213790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213791) 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, 10680 + ... + 10699.

It is an arithmetic number, because the mean of its divisors is an integer number (48105).

2²¹³⁷⁹⁰ is an apocalyptic number.

213790 is a deficient number, since it is larger than the sum of its proper divisors (171050).

213790 is a wasteful number, since it uses less digits than its factorization.

213790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21386.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 213790 is about 462.3743072447. The cubic root of 213790 is about 59.7946684881.

The spelling of 213790 in words is "two hundred thirteen thousand, seven hundred ninety".