81703935 has 24 divisors (see below), whose sum is σ = 147779424. Its totient is φ = 41680320.

The previous prime is 81703931. The next prime is 81703957. The reversal of 81703935 is 53930718.

It is not a de Polignac number, because 81703935 - 2² = 81703931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81703935.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81703931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38436 + ... + 40505.

It is an arithmetic number, because the mean of its divisors is an integer number (6157476).

Almost surely, 2^81703935 is an apocalyptic number.

81703935 is a deficient number, since it is larger than the sum of its proper divisors (66075489).

81703935 is a wasteful number, since it uses less digits than its factorization.

81703935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78975 (or 78972 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 81703935 is about 9039.0229007343. The cubic root of 81703935 is about 433.9246526235.

The spelling of 81703935 in words is "eighty-one million, seven hundred three thousand, nine hundred thirty-five".