81368627 has 4 divisors (see below), whose sum is σ = 82514736. Its totient is φ = 80222520.

The previous prime is 81368593. The next prime is 81368653. The reversal of 81368627 is 72686318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72686318 = 2 ⋅36343159.

It is a cyclic number.

It is not a de Polignac number, because 81368627 - 2¹⁰ = 81367603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81368527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572948 + ... + 573089.

It is an arithmetic number, because the mean of its divisors is an integer number (20628684).

Almost surely, 2^81368627 is an apocalyptic number.

81368627 is a deficient number, since it is larger than the sum of its proper divisors (1146109).

81368627 is a wasteful number, since it uses less digits than its factorization.

81368627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146108.

The product of its digits is 96768, while the sum is 41.

The square root of 81368627 is about 9020.4560306007. The cubic root of 81368627 is about 433.3302385709.

The spelling of 81368627 in words is "eighty-one million, three hundred sixty-eight thousand, six hundred twenty-seven".