81007702 has 16 divisors (see below), whose sum is σ = 127019520. Its totient is φ = 38674152.

The previous prime is 81007699. The next prime is 81007727. The reversal of 81007702 is 20770018.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32803 + ... + 35185.

It is an arithmetic number, because the mean of its divisors is an integer number (7938720).

Almost surely, 2^81007702 is an apocalyptic number.

81007702 is a deficient number, since it is larger than the sum of its proper divisors (46011818).

81007702 is a wasteful number, since it uses less digits than its factorization.

81007702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 81007702 is about 9000.4278787178. The cubic root of 81007702 is about 432.6885844924.

The spelling of 81007702 in words is "eighty-one million, seven thousand, seven hundred two".