83731261 has 2 divisors, whose sum is σ = 83731262. Its totient is φ = 83731260.

The previous prime is 83731213. The next prime is 83731301. The reversal of 83731261 is 16213738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80892036 + 2839225 = 8994^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 83731261 - 2⁹ = 83730749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83731211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41865630 + 41865631.

It is an arithmetic number, because the mean of its divisors is an integer number (41865631).

Almost surely, 2^83731261 is an apocalyptic number.

It is an amenable number.

83731261 is a deficient number, since it is larger than the sum of its proper divisors (1).

83731261 is an equidigital number, since it uses as much as digits as its factorization.

83731261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 83731261 is about 9150.4787306457. The cubic root of 83731261 is about 437.4843723397.

Adding to 83731261 its reverse (16213738), we get a palindrome (99944999).

The spelling of 83731261 in words is "eighty-three million, seven hundred thirty-one thousand, two hundred sixty-one".