81002946 has 8 divisors (see below), whose sum is σ = 162005904. Its totient is φ = 27000980.

The previous prime is 81002903. The next prime is 81002951. The reversal of 81002946 is 64920018.

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

81002946 is an admirable number.

It is a super-2 number, since 2×81002946² = 13122954521357832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6750240 + ... + 6750251.

It is an arithmetic number, because the mean of its divisors is an integer number (20250738).

Almost surely, 2^81002946 is an apocalyptic number.

81002946 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.

81002946 is a wasteful number, since it uses less digits than its factorization.

81002946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13500496.

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

The square root of 81002946 is about 9000.1636651785. The cubic root of 81002946 is about 432.6801165437.

The spelling of 81002946 in words is "eighty-one million, two thousand, nine hundred forty-six".