80961443 has 4 divisors (see below), whose sum is σ = 81718200. Its totient is φ = 80204688.

The previous prime is 80961427. The next prime is 80961479. The reversal of 80961443 is 34416908.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80961443 - 2⁴ = 80961427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80961043) 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, 378218 + ... + 378431.

It is an arithmetic number, because the mean of its divisors is an integer number (20429550).

Almost surely, 2^80961443 is an apocalyptic number.

80961443 is a deficient number, since it is larger than the sum of its proper divisors (756757).

80961443 is a wasteful number, since it uses less digits than its factorization.

80961443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756756.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 80961443 is about 8997.8576894725. The cubic root of 80961443 is about 432.6062073360.

The spelling of 80961443 in words is "eighty million, nine hundred sixty-one thousand, four hundred forty-three".