78903025 has 6 divisors (see below), whose sum is σ = 97839782. Its totient is φ = 63122400.

The previous prime is 78902987. The next prime is 78903043. The reversal of 78903025 is 52030987.

It can be written as a sum of positive squares in 3 ways, for example, as 633616 + 78269409 = 796^2 + 8847^2 .

It is not a de Polignac number, because 78903025 - 2¹⁵ = 78870257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1578036 + ... + 1578085.

Almost surely, 2^78903025 is an apocalyptic number.

It is an amenable number.

78903025 is a deficient number, since it is larger than the sum of its proper divisors (18936757).

78903025 is a wasteful number, since it uses less digits than its factorization.

78903025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156131 (or 3156126 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 78903025 is about 8882.7374721985. The cubic root of 78903025 is about 428.9083994001.

The spelling of 78903025 in words is "seventy-eight million, nine hundred three thousand, twenty-five".