83591261 has 8 divisors (see below), whose sum is σ = 95316984. Its totient is φ = 72622080.

The previous prime is 83591219. The next prime is 83591267. The reversal of 83591261 is 16219538.

It can be written as a sum of positive squares in 4 ways, for example, as 37283236 + 46308025 = 6106^2 + 6805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83591261 - 2⁶ = 83591197 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 (83591267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188900 + ... + 189341.

It is an arithmetic number, because the mean of its divisors is an integer number (11914623).

Almost surely, 2^83591261 is an apocalyptic number.

It is an amenable number.

83591261 is a deficient number, since it is larger than the sum of its proper divisors (11725723).

83591261 is a wasteful number, since it uses less digits than its factorization.

83591261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378271.

The product of its digits is 12960, while the sum is 35.

The square root of 83591261 is about 9142.8256573119. The cubic root of 83591261 is about 437.2404093765.

The spelling of 83591261 in words is "eighty-three million, five hundred ninety-one thousand, two hundred sixty-one".