78867073 has 4 divisors (see below), whose sum is σ = 78948288. Its totient is φ = 78785860.

The previous prime is 78867001. The next prime is 78867077. The reversal of 78867073 is 37076887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78867073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78867077) 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, 39133 + ... + 41098.

It is an arithmetic number, because the mean of its divisors is an integer number (19737072).

Almost surely, 2^78867073 is an apocalyptic number.

It is an amenable number.

78867073 is a deficient number, since it is larger than the sum of its proper divisors (81215).

78867073 is an equidigital number, since it uses as much as digits as its factorization.

78867073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81214.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 78867073 is about 8880.7135411520. The cubic root of 78867073 is about 428.8432457620.

The spelling of 78867073 in words is "seventy-eight million, eight hundred sixty-seven thousand, seventy-three".