83409331 has 2 divisors, whose sum is σ = 83409332. Its totient is φ = 83409330.

The previous prime is 83409329. The next prime is 83409341. The reversal of 83409331 is 13390438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83409331 - 2¹ = 83409329 is a prime.

It is a super-2 number, since 2×83409331² = 13914232995735122, which contains 22 as substring.

Together with 83409329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 83409293 and 83409302.

It is not a weakly prime, because it can be changed into another prime (83409341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41704665 + 41704666.

It is an arithmetic number, because the mean of its divisors is an integer number (41704666).

Almost surely, 2^83409331 is an apocalyptic number.

83409331 is a deficient number, since it is larger than the sum of its proper divisors (1).

83409331 is an equidigital number, since it uses as much as digits as its factorization.

83409331 is an evil number, because the sum of its binary digits is even.

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

The square root of 83409331 is about 9132.8709067850. The cubic root of 83409331 is about 436.9229721786.

Adding to 83409331 its reverse (13390438), we get a palindrome (96799769).

It can be divided in two parts, 8340 and 9331, that added together give a palindrome (17671).

The spelling of 83409331 in words is "eighty-three million, four hundred nine thousand, three hundred thirty-one".