80784261 has 6 divisors (see below), whose sum is σ = 116688390. Its totient is φ = 53856168.

The previous prime is 80784259. The next prime is 80784269. The reversal of 80784261 is 16248708.

It can be written as a sum of positive squares in only one way, i.e., 78322500 + 2461761 = 8850^2 + 1569^2 .

It is not a de Polignac number, because 80784261 - 2¹ = 80784259 is a prime.

It is a super-2 number, since 2×80784261² = 13052193650632242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80784269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4488006 + ... + 4488023.

It is an arithmetic number, because the mean of its divisors is an integer number (19448065).

Almost surely, 2^80784261 is an apocalyptic number.

It is an amenable number.

80784261 is a deficient number, since it is larger than the sum of its proper divisors (35904129).

80784261 is a wasteful number, since it uses less digits than its factorization.

80784261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8976035 (or 8976032 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80784261 is about 8988.0065086759. The cubic root of 80784261 is about 432.2903943852.

The spelling of 80784261 in words is "eighty million, seven hundred eighty-four thousand, two hundred sixty-one".