83709211 has 4 divisors (see below), whose sum is σ = 84068712. Its totient is φ = 83349712.

The previous prime is 83709191. The next prime is 83709257. The reversal of 83709211 is 11290738.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83709211 - 2¹¹ = 83707163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83704211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179401 + ... + 179866.

It is an arithmetic number, because the mean of its divisors is an integer number (21017178).

Almost surely, 2^83709211 is an apocalyptic number.

83709211 is a deficient number, since it is larger than the sum of its proper divisors (359501).

83709211 is a wasteful number, since it uses less digits than its factorization.

83709211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359500.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 83709211 is about 9149.2737963185. The cubic root of 83709211 is about 437.4459662248.

Adding to 83709211 its reverse (11290738), we get a palindrome (94999949).

The spelling of 83709211 in words is "eighty-three million, seven hundred nine thousand, two hundred eleven".