80442961 has 3 divisors (see below), whose sum is σ = 80451931. Its totient is φ = 80433992.

The previous prime is 80442959. The next prime is 80443001. The reversal of 80442961 is 16924408.

The square root of 80442961 is 8969.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 42497361 + 37945600 = 6519^2 + 6160^2 .

It is not a de Polignac number, because 80442961 - 2¹ = 80442959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80442161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4485 + ... + 13453.

Almost surely, 2^80442961 is an apocalyptic number.

80442961 is the 8969-th square number.

80442961 is the 4485-th centered octagonal number.

It is an amenable number.

80442961 is a deficient number, since it is larger than the sum of its proper divisors (8970).

80442961 is an frugal number, since it uses more digits than its factorization.

80442961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17938 (or 8969 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The cubic root of 80442961 is about 431.6807501422.

The spelling of 80442961 in words is "eighty million, four hundred forty-two thousand, nine hundred sixty-one".