81369002 has 16 divisors (see below), whose sum is σ = 143392032. Its totient is φ = 34140720.

The previous prime is 81368999. The next prime is 81369019. The reversal of 81369002 is 20096318.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141968 + ... + 142539.

It is an arithmetic number, because the mean of its divisors is an integer number (8962002).

Almost surely, 2^81369002 is an apocalyptic number.

81369002 is a deficient number, since it is larger than the sum of its proper divisors (62023030).

81369002 is a wasteful number, since it uses less digits than its factorization.

81369002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284533.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 81369002 is about 9020.4768166655. The cubic root of 81369002 is about 433.3309042599.

The spelling of 81369002 in words is "eighty-one million, three hundred sixty-nine thousand, two".