81369695 has 8 divisors (see below), whose sum is σ = 106520400. Its totient is φ = 59177920.

The previous prime is 81369689. The next prime is 81369703. The reversal of 81369695 is 59696318.

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

It is not a de Polignac number, because 81369695 - 2⁸ = 81369439 is a prime.

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, 739670 + ... + 739779.

It is an arithmetic number, because the mean of its divisors is an integer number (13315050).

Almost surely, 2^81369695 is an apocalyptic number.

81369695 is a deficient number, since it is larger than the sum of its proper divisors (25150705).

81369695 is a wasteful number, since it uses less digits than its factorization.

81369695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479465.

The product of its digits is 349920, while the sum is 47.

The square root of 81369695 is about 9020.5152291873. The cubic root of 81369695 is about 433.3321344477.

The spelling of 81369695 in words is "eighty-one million, three hundred sixty-nine thousand, six hundred ninety-five".