80951970 has 64 divisors (see below), whose sum is σ = 223119360. Its totient is φ = 18590400.

The previous prime is 80951947. The next prime is 80951971. The reversal of 80951970 is 7915908.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80951971) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 186 + ... + 12725.

It is an arithmetic number, because the mean of its divisors is an integer number (3486240).

Almost surely, 2^80951970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80951970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111559680).

80951970 is an abundant number, since it is smaller than the sum of its proper divisors (142167390).

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

80951970 is a wasteful number, since it uses less digits than its factorization.

80951970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12951.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 80951970 is about 8997.3312709936. The cubic root of 80951970 is about 432.5893341254.

The spelling of 80951970 in words is "eighty million, nine hundred fifty-one thousand, nine hundred seventy".