81350084 has 6 divisors (see below), whose sum is σ = 142362654. Its totient is φ = 40675040.

The previous prime is 81350069. The next prime is 81350099. The reversal of 81350084 is 48005318.

It is an interprime number because it is at equal distance from previous prime (81350069) and next prime (81350099).

It can be written as a sum of positive squares in only one way, i.e., 80820100 + 529984 = 8990^2 + 728^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10168757 + ... + 10168764.

It is an arithmetic number, because the mean of its divisors is an integer number (23727109).

Almost surely, 2^81350084 is an apocalyptic number.

It is an amenable number.

81350084 is a deficient number, since it is larger than the sum of its proper divisors (61012570).

81350084 is a wasteful number, since it uses less digits than its factorization.

81350084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20337525 (or 20337523 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 81350084 is about 9019.4281415176. The cubic root of 81350084 is about 433.2973190319.

The spelling of 81350084 in words is "eighty-one million, three hundred fifty thousand, eighty-four".