78853457 has 4 divisors (see below), whose sum is σ = 78926436. Its totient is φ = 78780480.

The previous prime is 78853447. The next prime is 78853487. The reversal of 78853457 is 75435887.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7349521 + 71503936 = 2711^2 + 8456^2 .

It is a cyclic number.

It is not a de Polignac number, because 78853457 - 2¹⁸ = 78591313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78853447) 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 in 3 ways as a sum of consecutive naturals, for example, 34844 + ... + 37037.

It is an arithmetic number, because the mean of its divisors is an integer number (19731609).

Almost surely, 2^78853457 is an apocalyptic number.

It is an amenable number.

78853457 is a deficient number, since it is larger than the sum of its proper divisors (72979).

78853457 is a wasteful number, since it uses less digits than its factorization.

78853457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72978.

The product of its digits is 940800, while the sum is 47.

The square root of 78853457 is about 8879.9469029944. The cubic root of 78853457 is about 428.8185651381.

It can be divided in two parts, 788 and 53457, that added together give a palindrome (54245).

The spelling of 78853457 in words is "seventy-eight million, eight hundred fifty-three thousand, four hundred fifty-seven".