78867311 has 4 divisors (see below), whose sum is σ = 79303224. Its totient is φ = 78431400.

The previous prime is 78867287. The next prime is 78867323. The reversal of 78867311 is 11376887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11376887 = 241 ⋅47207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78867311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78867331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217685 + ... + 218046.

It is an arithmetic number, because the mean of its divisors is an integer number (19825806).

Almost surely, 2^78867311 is an apocalyptic number.

78867311 is a deficient number, since it is larger than the sum of its proper divisors (435913).

78867311 is a wasteful number, since it uses less digits than its factorization.

78867311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435912.

The product of its digits is 56448, while the sum is 41.

The square root of 78867311 is about 8880.7269409660. The cubic root of 78867311 is about 428.8436771401.

The spelling of 78867311 in words is "seventy-eight million, eight hundred sixty-seven thousand, three hundred eleven".