78245903 has 2 divisors, whose sum is σ = 78245904. Its totient is φ = 78245902.

The previous prime is 78245887. The next prime is 78245957. The reversal of 78245903 is 30954287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78245903 - 2⁴ = 78245887 is a prime.

It is a super-2 number, since 2×78245903² = 12244842672570818, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78245603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39122951 + 39122952.

It is an arithmetic number, because the mean of its divisors is an integer number (39122952).

Almost surely, 2^78245903 is an apocalyptic number.

78245903 is a deficient number, since it is larger than the sum of its proper divisors (1).

78245903 is an equidigital number, since it uses as much as digits as its factorization.

78245903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 78245903 is about 8845.6714273140. The cubic root of 78245903 is about 427.7143969790.

The spelling of 78245903 in words is "seventy-eight million, two hundred forty-five thousand, nine hundred three".