80478877 has 4 divisors (see below), whose sum is σ = 80896060. Its totient is φ = 80061696.

The previous prime is 80478847. The next prime is 80478907. The reversal of 80478877 is 77887408.

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

It is an interprime number because it is at equal distance from previous prime (80478847) and next prime (80478907).

It can be written as a sum of positive squares in 2 ways, for example, as 19545241 + 60933636 = 4421^2 + 7806^2 .

It is a cyclic number.

It is not a de Polignac number, because 80478877 - 2¹⁵ = 80446109 is a prime.

It is a super-2 number, since 2×80478877² = 12953699286362258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80478877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80478847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208302 + ... + 208687.

It is an arithmetic number, because the mean of its divisors is an integer number (20224015).

Almost surely, 2^80478877 is an apocalyptic number.

It is an amenable number.

80478877 is a deficient number, since it is larger than the sum of its proper divisors (417183).

80478877 is a wasteful number, since it uses less digits than its factorization.

80478877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417182.

The product of its (nonzero) digits is 702464, while the sum is 49.

The square root of 80478877 is about 8971.0020064651. The cubic root of 80478877 is about 431.7449858804.

The spelling of 80478877 in words is "eighty million, four hundred seventy-eight thousand, eight hundred seventy-seven".