83212913 has 8 divisors (see below), whose sum is σ = 100105920. Its totient is φ = 67571280.

The previous prime is 83212907. The next prime is 83212957. The reversal of 83212913 is 31921238.

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

It is not a de Polignac number, because 83212913 - 2⁶ = 83212849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83212013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312698 + ... + 312963.

It is an arithmetic number, because the mean of its divisors is an integer number (12513240).

Almost surely, 2^83212913 is an apocalyptic number.

It is an amenable number.

83212913 is a deficient number, since it is larger than the sum of its proper divisors (16893007).

83212913 is a wasteful number, since it uses less digits than its factorization.

83212913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625687.

The product of its digits is 2592, while the sum is 29.

The square root of 83212913 is about 9122.1112139680. Note that the first 3 decimals coincide. The cubic root of 83212913 is about 436.5797372425.

The spelling of 83212913 in words is "eighty-three million, two hundred twelve thousand, nine hundred thirteen".