78863451 has 4 divisors (see below), whose sum is σ = 105151272. Its totient is φ = 52575632.

The previous prime is 78863437. The next prime is 78863453. The reversal of 78863451 is 15436887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78863451 - 2²¹ = 76766299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78863453) 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, 13143906 + ... + 13143911.

It is an arithmetic number, because the mean of its divisors is an integer number (26287818).

Almost surely, 2^78863451 is an apocalyptic number.

78863451 is a deficient number, since it is larger than the sum of its proper divisors (26287821).

78863451 is a wasteful number, since it uses less digits than its factorization.

78863451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26287820.

The product of its digits is 161280, while the sum is 42.

The square root of 78863451 is about 8880.5096137553. The cubic root of 78863451 is about 428.8366807323.

The spelling of 78863451 in words is "seventy-eight million, eight hundred sixty-three thousand, four hundred fifty-one".