81703433 has 6 divisors (see below), whose sum is σ = 95042826. Its totient is φ = 70031472.

The previous prime is 81703417. The next prime is 81703441. The reversal of 81703433 is 33430718.

It can be written as a sum of positive squares in only one way, i.e., 55160329 + 26543104 = 7427^2 + 5152^2 .

It is not a de Polignac number, because 81703433 - 2⁴ = 81703417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81703396 and 81703405.

It is not an unprimeable number, because it can be changed into a prime (81703403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 833660 + ... + 833757.

It is an arithmetic number, because the mean of its divisors is an integer number (15840471).

Almost surely, 2^81703433 is an apocalyptic number.

It is an amenable number.

81703433 is a deficient number, since it is larger than the sum of its proper divisors (13339393).

81703433 is a wasteful number, since it uses less digits than its factorization.

81703433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667431 (or 1667424 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 81703433 is about 9038.9951322036. The cubic root of 81703433 is about 433.9237639245.

The spelling of 81703433 in words is "eighty-one million, seven hundred three thousand, four hundred thirty-three".