647415383 has 4 divisors (see below), whose sum is σ = 647608488. Its totient is φ = 647222280.

The previous prime is 647415361. The next prime is 647415397. The reversal of 647415383 is 383514746.

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 647415383 - 2⁸ = 647415127 is a prime.

It is a super-3 number, since 3×647415383³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647415383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647415683) 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, 91433 + ... + 98258.

It is an arithmetic number, because the mean of its divisors is an integer number (161902122).

Almost surely, 2^647415383 is an apocalyptic number.

647415383 is a deficient number, since it is larger than the sum of its proper divisors (193105).

647415383 is a wasteful number, since it uses less digits than its factorization.

647415383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193104.

The product of its digits is 241920, while the sum is 41.

The square root of 647415383 is about 25444.3585692389. The cubic root of 647415383 is about 865.0894282005.

The spelling of 647415383 in words is "six hundred forty-seven million, four hundred fifteen thousand, three hundred eighty-three".