7878543 has 4 divisors (see below), whose sum is σ = 10504728. Its totient is φ = 5252360.

The previous prime is 7878527. The next prime is 7878551. The reversal of 7878543 is 3458787.

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 7878543 - 2⁴ = 7878527 is a prime.

It is an alternating number because its digits alternate between odd and even.

7878543 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7878495 and 7878504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878553) 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, 1313088 + ... + 1313093.

It is an arithmetic number, because the mean of its divisors is an integer number (2626182).

Almost surely, 2^7878543 is an apocalyptic number.

7878543 is a deficient number, since it is larger than the sum of its proper divisors (2626185).

7878543 is a wasteful number, since it uses less digits than its factorization.

7878543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626184.

The product of its digits is 188160, while the sum is 42.

The square root of 7878543 is about 2806.8742401469. The cubic root of 7878543 is about 198.9826925345.

The spelling of 7878543 in words is "seven million, eight hundred seventy-eight thousand, five hundred forty-three".