83120309 has 4 divisors (see below), whose sum is σ = 83144640. Its totient is φ = 83095980.

The previous prime is 83120281. The next prime is 83120311. The reversal of 83120309 is 90302138.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90302138 = 2 ⋅45151069.

It is a cyclic number.

It is not a de Polignac number, because 83120309 - 2¹⁶ = 83054773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83110309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5999 + ... + 14220.

It is an arithmetic number, because the mean of its divisors is an integer number (20786160).

Almost surely, 2^83120309 is an apocalyptic number.

It is an amenable number.

83120309 is a deficient number, since it is larger than the sum of its proper divisors (24331).

83120309 is a wasteful number, since it uses less digits than its factorization.

83120309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24330.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 83120309 is about 9117.0340023497. The cubic root of 83120309 is about 436.4177269845.

The spelling of 83120309 in words is "eighty-three million, one hundred twenty thousand, three hundred nine".