82780903 has 2 divisors, whose sum is σ = 82780904. Its totient is φ = 82780902.

The previous prime is 82780889. The next prime is 82780909. The reversal of 82780903 is 30908728.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82780903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82780909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41390451 + 41390452.

It is an arithmetic number, because the mean of its divisors is an integer number (41390452).

Almost surely, 2^82780903 is an apocalyptic number.

82780903 is a deficient number, since it is larger than the sum of its proper divisors (1).

82780903 is an equidigital number, since it uses as much as digits as its factorization.

82780903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 82780903 is about 9098.4011232744. The cubic root of 82780903 is about 435.8229069946.

The spelling of 82780903 in words is "eighty-two million, seven hundred eighty thousand, nine hundred three".