213939713 has 32 divisors (see below), whose sum is σ = 251748000. Its totient is φ = 180043776.

The previous prime is 213939709. The next prime is 213939731. The reversal of 213939713 is 317939312.

It can be written as a sum of positive squares in 16 ways, for example, as 108014449 + 105925264 = 10393^2 + 10292^2 .

It is a cyclic number.

It is not a de Polignac number, because 213939713 - 2² = 213939709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213939743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1435763 + ... + 1435911.

It is an arithmetic number, because the mean of its divisors is an integer number (7867125).

Almost surely, 2^213939713 is an apocalyptic number.

It is an amenable number.

213939713 is a deficient number, since it is larger than the sum of its proper divisors (37808287).

213939713 is a wasteful number, since it uses less digits than its factorization.

213939713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341.

The product of its digits is 30618, while the sum is 38.

The square root of 213939713 is about 14626.6781259451. The cubic root of 213939713 is about 598.0862291437.

The spelling of 213939713 in words is "two hundred thirteen million, nine hundred thirty-nine thousand, seven hundred thirteen".