80563877 has 4 divisors (see below), whose sum is σ = 80581836. Its totient is φ = 80545920.

The previous prime is 80563843. The next prime is 80563907. The reversal of 80563877 is 77836508.

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 2 ways, for example, as 54848836 + 25715041 = 7406^2 + 5071^2 .

It is a cyclic number.

It is not a de Polignac number, because 80563877 - 2¹² = 80559781 is a prime.

It is a super-2 number, since 2×80563877² = 12981076554542258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80563817) 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, 4127 + ... + 13347.

It is an arithmetic number, because the mean of its divisors is an integer number (20145459).

Almost surely, 2^80563877 is an apocalyptic number.

It is an amenable number.

80563877 is a deficient number, since it is larger than the sum of its proper divisors (17959).

80563877 is an equidigital number, since it uses as much as digits as its factorization.

80563877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17958.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 80563877 is about 8975.7382426183. The cubic root of 80563877 is about 431.8969322162.

The spelling of 80563877 in words is "eighty million, five hundred sixty-three thousand, eight hundred seventy-seven".