78854951 has 4 divisors (see below), whose sum is σ = 90119952. Its totient is φ = 67589952.

The previous prime is 78854939. The next prime is 78854953. The reversal of 78854951 is 15945887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15945887 = 307 ⋅51941.

It is a cyclic number.

It is not a de Polignac number, because 78854951 - 2¹⁴ = 78838567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78854896 and 78854905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78854953) 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, 5632490 + ... + 5632503.

It is an arithmetic number, because the mean of its divisors is an integer number (22529988).

Almost surely, 2^78854951 is an apocalyptic number.

78854951 is a deficient number, since it is larger than the sum of its proper divisors (11265001).

78854951 is a wasteful number, since it uses less digits than its factorization.

78854951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11265000.

The product of its digits is 403200, while the sum is 47.

The square root of 78854951 is about 8880.0310247206. The cubic root of 78854951 is about 428.8212733300.

The spelling of 78854951 in words is "seventy-eight million, eight hundred fifty-four thousand, nine hundred fifty-one".