647474355 has 24 divisors (see below), whose sum is σ = 1224316080. Its totient is φ = 313926720.

The previous prime is 647474351. The next prime is 647474369. The reversal of 647474355 is 553474746.

It is not a de Polignac number, because 647474355 - 2² = 647474351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 647474355.

It is not an unprimeable number, because it can be changed into a prime (647474351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653520 + ... + 654509.

It is an arithmetic number, because the mean of its divisors is an integer number (51013170).

Almost surely, 2^647474355 is an apocalyptic number.

647474355 is a deficient number, since it is larger than the sum of its proper divisors (576841725).

647474355 is a wasteful number, since it uses less digits than its factorization.

647474355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308051 (or 1308048 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 45.

The square root of 647474355 is about 25445.5173851899. The cubic root of 647474355 is about 865.1156939264.

The spelling of 647474355 in words is "six hundred forty-seven million, four hundred seventy-four thousand, three hundred fifty-five".