213970 has 8 divisors (see below), whose sum is σ = 385164. Its totient is φ = 85584.

The previous prime is 213953. The next prime is 213973. The reversal of 213970 is 79312.

213970 is nontrivially palindromic in base 6 and base 7.

213970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 14161 = 447^2 + 119^2 .

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

It is not an unprimeable number, because it can be changed into a prime (213973) by changing a digit.

213970 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10689 + ... + 10708.

2²¹³⁹⁷⁰ is an apocalyptic number.

213970 is a deficient number, since it is larger than the sum of its proper divisors (171194).

213970 is a wasteful number, since it uses less digits than its factorization.

213970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21404.

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

The square root of 213970 is about 462.5689137847. The cubic root of 213970 is about 59.8114451086.

It can be divided in two parts, 2139 and 70, that added together give a square (2209 = 47²).

The spelling of 213970 in words is "two hundred thirteen thousand, nine hundred seventy".