80405783 has 4 divisors (see below), whose sum is σ = 80430840. Its totient is φ = 80380728.

The previous prime is 80405779. The next prime is 80405789. The reversal of 80405783 is 38750408.

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 80405783 - 2² = 80405779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80405789) 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, 6860 + ... + 14417.

It is an arithmetic number, because the mean of its divisors is an integer number (20107710).

Almost surely, 2^80405783 is an apocalyptic number.

80405783 is a deficient number, since it is larger than the sum of its proper divisors (25057).

80405783 is a wasteful number, since it uses less digits than its factorization.

80405783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25056.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 80405783 is about 8966.9271771326. The cubic root of 80405783 is about 431.6142371753.

The spelling of 80405783 in words is "eighty million, four hundred five thousand, seven hundred eighty-three".