83831261 has 4 divisors (see below), whose sum is σ = 83893692. Its totient is φ = 83768832.

The previous prime is 83831207. The next prime is 83831269. The reversal of 83831261 is 16213838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80102500 + 3728761 = 8950^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 83831261 - 2¹⁰ = 83830237 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 (83831269) 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, 29156 + ... + 31901.

It is an arithmetic number, because the mean of its divisors is an integer number (20973423).

Almost surely, 2^83831261 is an apocalyptic number.

It is an amenable number.

83831261 is a deficient number, since it is larger than the sum of its proper divisors (62431).

83831261 is a wasteful number, since it uses less digits than its factorization.

83831261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62430.

The product of its digits is 6912, while the sum is 32.

The square root of 83831261 is about 9155.9412951373. The cubic root of 83831261 is about 437.6584651539.

The spelling of 83831261 in words is "eighty-three million, eight hundred thirty-one thousand, two hundred sixty-one".