80811970 has 8 divisors (see below), whose sum is σ = 145461564. Its totient is φ = 32324784.

The previous prime is 80811967. The next prime is 80811979. The reversal of 80811970 is 7911808.

It can be written as a sum of positive squares in 2 ways, for example, as 79941481 + 870489 = 8941^2 + 933^2 .

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

It is not an unprimeable number, because it can be changed into a prime (80811979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040589 + ... + 4040608.

Almost surely, 2^80811970 is an apocalyptic number.

80811970 is a deficient number, since it is larger than the sum of its proper divisors (64649594).

80811970 is a wasteful number, since it uses less digits than its factorization.

80811970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081204.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 80811970 is about 8989.5478195513. The cubic root of 80811970 is about 432.3398139344.

The spelling of 80811970 in words is "eighty million, eight hundred eleven thousand, nine hundred seventy".