81713485 has 16 divisors (see below), whose sum is σ = 113097600. Its totient is φ = 55515456.

The previous prime is 81713473. The next prime is 81713491. The reversal of 81713485 is 58431718.

It is a cyclic number.

It is not a de Polignac number, because 81713485 - 2⁵ = 81713453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6895 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (7068600).

Almost surely, 2^81713485 is an apocalyptic number.

It is an amenable number.

81713485 is a deficient number, since it is larger than the sum of its proper divisors (31384115).

81713485 is a wasteful number, since it uses less digits than its factorization.

81713485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21540.

The product of its digits is 26880, while the sum is 37.

The square root of 81713485 is about 9039.5511503614. The cubic root of 81713485 is about 433.9415584555.

The spelling of 81713485 in words is "eighty-one million, seven hundred thirteen thousand, four hundred eighty-five".