78625247 has 8 divisors (see below), whose sum is σ = 82590720. Its totient is φ = 74705400.

The previous prime is 78625243. The next prime is 78625321. The reversal of 78625247 is 74252687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78625247 - 2² = 78625243 is a prime.

It is a super-2 number, since 2×78625247² = 12363858931622018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78625241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7847 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (10323840).

Almost surely, 2^78625247 is an apocalyptic number.

78625247 is a deficient number, since it is larger than the sum of its proper divisors (3965473).

78625247 is a wasteful number, since it uses less digits than its factorization.

78625247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22813.

The product of its digits is 188160, while the sum is 41.

The square root of 78625247 is about 8867.0878534049. The cubic root of 78625247 is about 428.4044837655.

The spelling of 78625247 in words is "seventy-eight million, six hundred twenty-five thousand, two hundred forty-seven".