81237083 has 2 divisors, whose sum is σ = 81237084. Its totient is φ = 81237082.

The previous prime is 81237073. The next prime is 81237097. The reversal of 81237083 is 38073218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81237083 - 2¹⁸ = 80974939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81237073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40618541 + 40618542.

It is an arithmetic number, because the mean of its divisors is an integer number (40618542).

Almost surely, 2^81237083 is an apocalyptic number.

81237083 is a deficient number, since it is larger than the sum of its proper divisors (1).

81237083 is an equidigital number, since it uses as much as digits as its factorization.

81237083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 81237083 is about 9013.1616539370. The cubic root of 81237083 is about 433.0965992273.

The spelling of 81237083 in words is "eighty-one million, two hundred thirty-seven thousand, eighty-three".