83509121 has 4 divisors (see below), whose sum is σ = 83549232. Its totient is φ = 83469012.

The previous prime is 83509103. The next prime is 83509141. The reversal of 83509121 is 12190538.

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 83509121 - 2²² = 79314817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83509141) 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, 16751 + ... + 21156.

It is an arithmetic number, because the mean of its divisors is an integer number (20887308).

Almost surely, 2^83509121 is an apocalyptic number.

It is an amenable number.

83509121 is a deficient number, since it is larger than the sum of its proper divisors (40111).

83509121 is a wasteful number, since it uses less digits than its factorization.

83509121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40110.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 83509121 is about 9138.3325065353. The cubic root of 83509121 is about 437.0971460058.

Adding to 83509121 its reverse (12190538), we get a palindrome (95699659).

It can be divided in two parts, 8350 and 9121, that added together give a palindrome (17471).

The spelling of 83509121 in words is "eighty-three million, five hundred nine thousand, one hundred twenty-one".