81200694 has 8 divisors (see below), whose sum is σ = 162401400. Its totient is φ = 27066896.

The previous prime is 81200689. The next prime is 81200711. The reversal of 81200694 is 49600218.

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

81200694 is an admirable number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6766719 + ... + 6766730.

It is an arithmetic number, because the mean of its divisors is an integer number (20300175).

Almost surely, 2^81200694 is an apocalyptic number.

81200694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81200694 is a wasteful number, since it uses less digits than its factorization.

81200694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13533454.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 81200694 is about 9011.1427688168. The cubic root of 81200694 is about 433.0319230749.

The spelling of 81200694 in words is "eighty-one million, two hundred thousand, six hundred ninety-four".