78797245 has 4 divisors (see below), whose sum is σ = 94556700. Its totient is φ = 63037792.

The previous prime is 78797231. The next prime is 78797249. The reversal of 78797245 is 54279787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54279787 = 1861 ⋅29167.

It can be written as a sum of positive squares in 2 ways, for example, as 41964484 + 36832761 = 6478^2 + 6069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78797245 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78797249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7879720 + ... + 7879729.

It is an arithmetic number, because the mean of its divisors is an integer number (23639175).

Almost surely, 2^78797245 is an apocalyptic number.

It is an amenable number.

78797245 is a deficient number, since it is larger than the sum of its proper divisors (15759455).

78797245 is a wasteful number, since it uses less digits than its factorization.

78797245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15759454.

The product of its digits is 987840, while the sum is 49.

The square root of 78797245 is about 8876.7812297026. The cubic root of 78797245 is about 428.7166440970.

The spelling of 78797245 in words is "seventy-eight million, seven hundred ninety-seven thousand, two hundred forty-five".