81341077 has 4 divisors (see below), whose sum is σ = 81434080. Its totient is φ = 81248076.

The previous prime is 81341047. The next prime is 81341083. The reversal of 81341077 is 77014318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81341077 - 2¹¹ = 81339029 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 (81341047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45177 + ... + 46942.

It is an arithmetic number, because the mean of its divisors is an integer number (20358520).

Almost surely, 2^81341077 is an apocalyptic number.

It is an amenable number.

81341077 is a deficient number, since it is larger than the sum of its proper divisors (93003).

81341077 is an equidigital number, since it uses as much as digits as its factorization.

81341077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93002.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 81341077 is about 9018.9288166611. The cubic root of 81341077 is about 433.2813270263.

The spelling of 81341077 in words is "eighty-one million, three hundred forty-one thousand, seventy-seven".