647138146 has 8 divisors (see below), whose sum is σ = 970850304. Its totient is φ = 323521380.

The previous prime is 647138131. The next prime is 647138197. The reversal of 647138146 is 641831746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 647138099 and 647138108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3370 + ... + 36133.

It is an arithmetic number, because the mean of its divisors is an integer number (121356288).

Almost surely, 2^647138146 is an apocalyptic number.

647138146 is a deficient number, since it is larger than the sum of its proper divisors (323712158).

647138146 is a wasteful number, since it uses less digits than its factorization.

647138146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47696.

The product of its digits is 96768, while the sum is 40.

The square root of 647138146 is about 25438.9100788536. The cubic root of 647138146 is about 864.9659273558.

The spelling of 647138146 in words is "six hundred forty-seven million, one hundred thirty-eight thousand, one hundred forty-six".