213713837 has 2 divisors, whose sum is σ = 213713838. Its totient is φ = 213713836.

The previous prime is 213713833. The next prime is 213713869. The reversal of 213713837 is 738317312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133772356 + 79941481 = 11566^2 + 8941^2 .

It is a cyclic number.

It is not a de Polignac number, because 213713837 - 2² = 213713833 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213713797 and 213713806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213713833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106856918 + 106856919.

It is an arithmetic number, because the mean of its divisors is an integer number (106856919).

Almost surely, 2^213713837 is an apocalyptic number.

It is an amenable number.

213713837 is a deficient number, since it is larger than the sum of its proper divisors (1).

213713837 is an equidigital number, since it uses as much as digits as its factorization.

213713837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 213713837 is about 14618.9547163947. The cubic root of 213713837 is about 597.8756699872.

The spelling of 213713837 in words is "two hundred thirteen million, seven hundred thirteen thousand, eight hundred thirty-seven".