81876395 has 8 divisors (see below), whose sum is σ = 98300256. Its totient is φ = 65468736.

The previous prime is 81876391. The next prime is 81876407. The reversal of 81876395 is 59367818.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81876395 - 2² = 81876391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81876391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17639 + ... + 21791.

It is an arithmetic number, because the mean of its divisors is an integer number (12287532).

Almost surely, 2^81876395 is an apocalyptic number.

81876395 is a deficient number, since it is larger than the sum of its proper divisors (16423861).

81876395 is a wasteful number, since it uses less digits than its factorization.

81876395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101.

The product of its digits is 362880, while the sum is 47.

The square root of 81876395 is about 9048.5576198641. The cubic root of 81876395 is about 434.2297462676.

The spelling of 81876395 in words is "eighty-one million, eight hundred seventy-six thousand, three hundred ninety-five".