81607135 has 8 divisors (see below), whose sum is σ = 97980336. Its totient is φ = 65251200.

The previous prime is 81607117. The next prime is 81607153. The reversal of 81607135 is 53170618.

It is an interprime number because it is at equal distance from previous prime (81607117) and next prime (81607153).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81607135 - 2⁷ = 81607007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81607097 and 81607106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11092 + ... + 16918.

It is an arithmetic number, because the mean of its divisors is an integer number (12247542).

Almost surely, 2^81607135 is an apocalyptic number.

81607135 is a deficient number, since it is larger than the sum of its proper divisors (16373201).

81607135 is a wasteful number, since it uses less digits than its factorization.

81607135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 81607135 is about 9033.6667527644. Note that the first 3 decimals coincide. The cubic root of 81607135 is about 433.7532185893.

The spelling of 81607135 in words is "eighty-one million, six hundred seven thousand, one hundred thirty-five".