81703135 has 16 divisors (see below), whose sum is σ = 106536960. Its totient is φ = 59922720.

The previous prime is 81703129. The next prime is 81703151. The reversal of 81703135 is 53130718.

It is not a de Polignac number, because 81703135 - 2⁵ = 81703103 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 10927 + ... + 16816.

It is an arithmetic number, because the mean of its divisors is an integer number (6658560).

Almost surely, 2^81703135 is an apocalyptic number.

81703135 is a deficient number, since it is larger than the sum of its proper divisors (24833825).

81703135 is a wasteful number, since it uses less digits than its factorization.

81703135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27798.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 81703135 is about 9038.9786480553. The cubic root of 81703135 is about 433.9232363684.

The spelling of 81703135 in words is "eighty-one million, seven hundred three thousand, one hundred thirty-five".