81868467 has 8 divisors (see below), whose sum is σ = 110695680. Its totient is φ = 53810120.

The previous prime is 81868441. The next prime is 81868469. The reversal of 81868467 is 76486818.

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 81868467 - 2¹¹ = 81866419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81868469) 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, 191967 + ... + 192392.

It is an arithmetic number, because the mean of its divisors is an integer number (13836960).

Almost surely, 2^81868467 is an apocalyptic number.

81868467 is a deficient number, since it is larger than the sum of its proper divisors (28827213).

81868467 is a wasteful number, since it uses less digits than its factorization.

81868467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384433.

The product of its digits is 516096, while the sum is 48.

The square root of 81868467 is about 9048.1195283882. The cubic root of 81868467 is about 434.2157304879.

It can be divided in two parts, 8186 and 8467, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 81868467 in words is "eighty-one million, eight hundred sixty-eight thousand, four hundred sixty-seven".