80782501 has 2 divisors, whose sum is σ = 80782502. Its totient is φ = 80782500.

The previous prime is 80782469. The next prime is 80782511. The reversal of 80782501 is 10528708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76580001 + 4202500 = 8751^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 80782501 - 2⁵ = 80782469 is a prime.

It is a super-3 number, since 3×80782501³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80782511) 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 as a sum of consecutive naturals, namely, 40391250 + 40391251.

It is an arithmetic number, because the mean of its divisors is an integer number (40391251).

Almost surely, 2^80782501 is an apocalyptic number.

It is an amenable number.

80782501 is a deficient number, since it is larger than the sum of its proper divisors (1).

80782501 is an equidigital number, since it uses as much as digits as its factorization.

80782501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 80782501 is about 8987.9085998913. The cubic root of 80782501 is about 432.2872550088.

The spelling of 80782501 in words is "eighty million, seven hundred eighty-two thousand, five hundred one".