81354127 has 4 divisors (see below), whose sum is σ = 83338416. Its totient is φ = 79369840.

The previous prime is 81354113. The next prime is 81354167. The reversal of 81354127 is 72145318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81354127 - 2⁷ = 81353999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81354167) 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, 992083 + ... + 992164.

It is an arithmetic number, because the mean of its divisors is an integer number (20834604).

Almost surely, 2^81354127 is an apocalyptic number.

81354127 is a deficient number, since it is larger than the sum of its proper divisors (1984289).

81354127 is a wasteful number, since it uses less digits than its factorization.

81354127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984288.

The product of its digits is 6720, while the sum is 31.

The square root of 81354127 is about 9019.6522660245. The cubic root of 81354127 is about 433.3044970292.

The spelling of 81354127 in words is "eighty-one million, three hundred fifty-four thousand, one hundred twenty-seven".