80784553 has 2 divisors, whose sum is σ = 80784554. Its totient is φ = 80784552.

The previous prime is 80784503. The next prime is 80784569. The reversal of 80784553 is 35548708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79709184 + 1075369 = 8928^2 + 1037^2 .

It is a cyclic number.

It is not a de Polignac number, because 80784553 - 2¹⁷ = 80653481 is a prime.

It is a super-2 number, since 2×80784553² = 13052288006819618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80784503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40392276 + 40392277.

It is an arithmetic number, because the mean of its divisors is an integer number (40392277).

Almost surely, 2^80784553 is an apocalyptic number.

It is an amenable number.

80784553 is a deficient number, since it is larger than the sum of its proper divisors (1).

80784553 is an equidigital number, since it uses as much as digits as its factorization.

80784553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 80784553 is about 8988.0227525302. The cubic root of 80784553 is about 432.2909152319.

The spelling of 80784553 in words is "eighty million, seven hundred eighty-four thousand, five hundred fifty-three".