80445403 has 16 divisors (see below), whose sum is σ = 85800960. Its totient is φ = 75297600.

The previous prime is 80445371. The next prime is 80445419. The reversal of 80445403 is 30454408.

It is a cyclic number.

It is not a de Polignac number, because 80445403 - 2⁵ = 80445371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80445503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212068 + ... + 212446.

It is an arithmetic number, because the mean of its divisors is an integer number (5362560).

Almost surely, 2^80445403 is an apocalyptic number.

80445403 is a deficient number, since it is larger than the sum of its proper divisors (5355557).

80445403 is a wasteful number, since it uses less digits than its factorization.

80445403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 80445403 is about 8969.1361345450. The cubic root of 80445403 is about 431.6851182630.

The spelling of 80445403 in words is "eighty million, four hundred forty-five thousand, four hundred three".