83212393 has 4 divisors (see below), whose sum is σ = 90777168. Its totient is φ = 75647620.

The previous prime is 83212387. The next prime is 83212403. The reversal of 83212393 is 39321238.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83212393 - 2²¹ = 81115241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83212313) 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, 3782371 + ... + 3782392.

It is an arithmetic number, because the mean of its divisors is an integer number (22694292).

Almost surely, 2^83212393 is an apocalyptic number.

It is an amenable number.

83212393 is a deficient number, since it is larger than the sum of its proper divisors (7564775).

83212393 is a wasteful number, since it uses less digits than its factorization.

83212393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7564774.

The product of its digits is 7776, while the sum is 31.

The square root of 83212393 is about 9122.0827117495. The cubic root of 83212393 is about 436.5788278406.

It can be divided in two parts, 832 and 12393, that added together give a square (13225 = 115²).

The spelling of 83212393 in words is "eighty-three million, two hundred twelve thousand, three hundred ninety-three".