83408261 has 4 divisors (see below), whose sum is σ = 85348032. Its totient is φ = 81468492.

The previous prime is 83408251. The next prime is 83408287. The reversal of 83408261 is 16280438.

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 83408261 - 2¹⁸ = 83146117 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 (83408251) 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, 969821 + ... + 969906.

It is an arithmetic number, because the mean of its divisors is an integer number (21337008).

Almost surely, 2^83408261 is an apocalyptic number.

It is an amenable number.

83408261 is a deficient number, since it is larger than the sum of its proper divisors (1939771).

83408261 is a wasteful number, since it uses less digits than its factorization.

83408261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939770.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 83408261 is about 9132.8123269889. The cubic root of 83408261 is about 436.9211038441.

Adding to 83408261 its reverse (16280438), we get a palindrome (99688699).

The spelling of 83408261 in words is "eighty-three million, four hundred eight thousand, two hundred sixty-one".