647930471 has 8 divisors (see below), whose sum is σ = 660066384. Its totient is φ = 635843520.

The previous prime is 647930449. The next prime is 647930483. The reversal of 647930471 is 174039746.

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

It is a cyclic number.

It is not a de Polignac number, because 647930471 - 2¹⁴ = 647914087 is a prime.

It is a super-3 number, since 3×647930471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647930431) 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, 15035 + ... + 39011.

It is an arithmetic number, because the mean of its divisors is an integer number (82508298).

Almost surely, 2^647930471 is an apocalyptic number.

647930471 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

647930471 is a deficient number, since it is larger than the sum of its proper divisors (12135913).

647930471 is a wasteful number, since it uses less digits than its factorization.

647930471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24481.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 647930471 is about 25454.4784075416. The cubic root of 647930471 is about 865.3187910248.

The spelling of 647930471 in words is "six hundred forty-seven million, nine hundred thirty thousand, four hundred seventy-one".