8400727 has 4 divisors (see below), whose sum is σ = 8766000. Its totient is φ = 8035456.

The previous prime is 8400713. The next prime is 8400731. The reversal of 8400727 is 7270048.

8400727 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8400727 - 2¹¹ = 8398679 is a prime.

It is an Ulam number.

It is a Duffinian number.

8400727 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8400695 and 8400704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8400757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182602 + ... + 182647.

It is an arithmetic number, because the mean of its divisors is an integer number (2191500).

Almost surely, 2^8400727 is an apocalyptic number.

8400727 is a deficient number, since it is larger than the sum of its proper divisors (365273).

8400727 is a wasteful number, since it uses less digits than its factorization.

8400727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365272.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 8400727 is about 2898.4007659397. The cubic root of 8400727 is about 203.2851356394.

The spelling of 8400727 in words is "eight million, four hundred thousand, seven hundred twenty-seven".