647213367 has 8 divisors (see below), whose sum is σ = 875831296. Its totient is φ = 425035512.

The previous prime is 647213323. The next prime is 647213383. The reversal of 647213367 is 763312746.

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

It is not a de Polignac number, because 647213367 - 2¹¹ = 647211319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647213467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609783 + ... + 1610184.

It is an arithmetic number, because the mean of its divisors is an integer number (109478912).

Almost surely, 2^647213367 is an apocalyptic number.

647213367 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

647213367 is a deficient number, since it is larger than the sum of its proper divisors (228617929).

647213367 is a wasteful number, since it uses less digits than its factorization.

647213367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220037.

The product of its digits is 127008, while the sum is 39.

The square root of 647213367 is about 25440.3884993921. The cubic root of 647213367 is about 864.9994395622. Note that the first 3 decimals are identical.

The spelling of 647213367 in words is "six hundred forty-seven million, two hundred thirteen thousand, three hundred sixty-seven".