78900025 has 6 divisors (see below), whose sum is σ = 97836062. Its totient is φ = 63120000.

The previous prime is 78900011. The next prime is 78900037. The reversal of 78900025 is 52000987.

It can be written as a sum of positive squares in 3 ways, for example, as 16426809 + 62473216 = 4053^2 + 7904^2 .

It is not a de Polignac number, because 78900025 - 2⁵ = 78899993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78900025.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1577976 + ... + 1578025.

Almost surely, 2^78900025 is an apocalyptic number.

It is an amenable number.

78900025 is a deficient number, since it is larger than the sum of its proper divisors (18936037).

78900025 is a wasteful number, since it uses less digits than its factorization.

78900025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156011 (or 3156006 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 78900025 is about 8882.5686037317. The cubic root of 78900025 is about 428.9029634382.

The spelling of 78900025 in words is "seventy-eight million, nine hundred thousand, twenty-five".