78586073 has 4 divisors (see below), whose sum is σ = 78604260. Its totient is φ = 78567888.

The previous prime is 78586063. The next prime is 78586097. The reversal of 78586073 is 37068587.

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 17073424 + 61512649 = 4132^2 + 7843^2 .

It is a cyclic number.

It is not a de Polignac number, because 78586073 - 2¹⁰ = 78585049 is a prime.

It is a super-2 number, since 2×78586073² = 12351541739122658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78586063) 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, 1511 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (19651065).

Almost surely, 2^78586073 is an apocalyptic number.

It is an amenable number.

78586073 is a deficient number, since it is larger than the sum of its proper divisors (18187).

78586073 is a wasteful number, since it uses less digits than its factorization.

78586073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 78586073 is about 8864.8786229705. The cubic root of 78586073 is about 428.3333229707. Note that the first 4 decimals are identical.

It can be divided in two parts, 7858 and 6073, that added together give a palindrome (13931).

The spelling of 78586073 in words is "seventy-eight million, five hundred eighty-six thousand, seventy-three".