78550867 has 4 divisors (see below), whose sum is σ = 79723336. Its totient is φ = 77378400.

The previous prime is 78550861. The next prime is 78550873. The reversal of 78550867 is 76805587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76805587 = 41 ⋅1873307.

It is an interprime number because it is at equal distance from previous prime (78550861) and next prime (78550873).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78550867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78550861) 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, 586134 + ... + 586267.

It is an arithmetic number, because the mean of its divisors is an integer number (19930834).

Almost surely, 2^78550867 is an apocalyptic number.

78550867 is a deficient number, since it is larger than the sum of its proper divisors (1172469).

78550867 is a wasteful number, since it uses less digits than its factorization.

78550867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172468.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 78550867 is about 8862.8926993392. The cubic root of 78550867 is about 428.2693499924.

The spelling of 78550867 in words is "seventy-eight million, five hundred fifty thousand, eight hundred sixty-seven".