213907 has 4 divisors (see below), whose sum is σ = 214840. Its totient is φ = 212976.

The previous prime is 213901. The next prime is 213919. The reversal of 213907 is 709312.

213907 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213907 - 2¹¹ = 211859 is a prime.

It is the 463-rd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213901) by changing a digit.

It is a nontrivial repunit in base 462.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (53710).

2²¹³⁹⁰⁷ is an apocalyptic number.

213907 is a deficient number, since it is larger than the sum of its proper divisors (933).

213907 is an equidigital number, since it uses as much as digits as its factorization.

213907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932.

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

The square root of 213907 is about 462.5008108101. The cubic root of 213907 is about 59.8055743621.

The spelling of 213907 in words is "two hundred thirteen thousand, nine hundred seven".