78325903 has 2 divisors, whose sum is σ = 78325904. Its totient is φ = 78325902.

The previous prime is 78325889. The next prime is 78325909. The reversal of 78325903 is 30952387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78325903 - 2¹³ = 78317711 is a prime.

It is a super-2 number, since 2×78325903² = 12269894161530818, which contains 22 as substring.

It is equal to p_4577428 and since 78325903 and 4577428 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78325909) 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, 39162951 + 39162952.

It is an arithmetic number, because the mean of its divisors is an integer number (39162952).

Almost surely, 2^78325903 is an apocalyptic number.

78325903 is a deficient number, since it is larger than the sum of its proper divisors (1).

78325903 is an equidigital number, since it uses as much as digits as its factorization.

78325903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 78325903 is about 8850.1922577987. The cubic root of 78325903 is about 427.8601149257.

The spelling of 78325903 in words is "seventy-eight million, three hundred twenty-five thousand, nine hundred three".