81367675 has 12 divisors (see below), whose sum is σ = 105283440. Its totient is φ = 62263520.

The previous prime is 81367619. The next prime is 81367679. The reversal of 81367675 is 57676318.

It is not a de Polignac number, because 81367675 - 2⁹ = 81367163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81367679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70180 + ... + 71329.

It is an arithmetic number, because the mean of its divisors is an integer number (8773620).

Almost surely, 2^81367675 is an apocalyptic number.

81367675 is a deficient number, since it is larger than the sum of its proper divisors (23915765).

81367675 is a wasteful number, since it uses less digits than its factorization.

81367675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141542 (or 141537 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 81367675 is about 9020.4032614956. The cubic root of 81367675 is about 433.3285485994.

The spelling of 81367675 in words is "eighty-one million, three hundred sixty-seven thousand, six hundred seventy-five".