647707465 has 8 divisors (see below), whose sum is σ = 787896648. Its totient is φ = 511067520.

The previous prime is 647707451. The next prime is 647707469. The reversal of 647707465 is 564707746.

It can be written as a sum of positive squares in 4 ways, for example, as 37222201 + 610485264 = 6101^2 + 24708^2 .

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

It is not a de Polignac number, because 647707465 - 2⁵ = 647707433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647707469) 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, 886906 + ... + 887635.

It is an arithmetic number, because the mean of its divisors is an integer number (98487081).

Almost surely, 2^647707465 is an apocalyptic number.

It is an amenable number.

647707465 is a deficient number, since it is larger than the sum of its proper divisors (140189183).

647707465 is a wasteful number, since it uses less digits than its factorization.

647707465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774619.

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 647707465 is about 25450.0975440174. The cubic root of 647707465 is about 865.2195039180.

The spelling of 647707465 in words is "six hundred forty-seven million, seven hundred seven thousand, four hundred sixty-five".