83709213 has 32 divisors (see below), whose sum is σ = 135032832. Its totient is φ = 45091200.

The previous prime is 83709191. The next prime is 83709257. The reversal of 83709213 is 31290738.

It is not a de Polignac number, because 83709213 - 2⁹ = 83708701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83709013) 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, 33073 + ... + 35513.

It is an arithmetic number, because the mean of its divisors is an integer number (4219776).

Almost surely, 2^83709213 is an apocalyptic number.

It is an amenable number.

83709213 is a deficient number, since it is larger than the sum of its proper divisors (51323619).

83709213 is a wasteful number, since it uses less digits than its factorization.

83709213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 83709213 is about 9149.2739056168. The cubic root of 83709213 is about 437.4459697086.

The spelling of 83709213 in words is "eighty-three million, seven hundred nine thousand, two hundred thirteen".