6400147 has 4 divisors (see below), whose sum is σ = 6892480. Its totient is φ = 5907816.

The previous prime is 6400139. The next prime is 6400151. The reversal of 6400147 is 7410046.

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 6400147 - 2³ = 6400139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400117) 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, 246147 + ... + 246172.

It is an arithmetic number, because the mean of its divisors is an integer number (1723120).

Almost surely, 2^6400147 is an apocalyptic number.

6400147 is a deficient number, since it is larger than the sum of its proper divisors (492333).

6400147 is a wasteful number, since it uses less digits than its factorization.

6400147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492332.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6400147 is about 2529.8511813939. The cubic root of 6400147 is about 185.6649748202.

The spelling of 6400147 in words is "six million, four hundred thousand, one hundred forty-seven".