647457007 has 4 divisors (see below), whose sum is σ = 661232736. Its totient is φ = 633681280.

The previous prime is 647456983. The next prime is 647457011. The reversal of 647457007 is 700754746.

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 647457007 - 2¹¹ = 647454959 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 (647457017) 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, 6887794 + ... + 6887887.

It is an arithmetic number, because the mean of its divisors is an integer number (165308184).

Almost surely, 2^647457007 is an apocalyptic number.

647457007 is a deficient number, since it is larger than the sum of its proper divisors (13775729).

647457007 is a wasteful number, since it uses less digits than its factorization.

647457007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13775728.

The product of its (nonzero) digits is 164640, while the sum is 40.

The square root of 647457007 is about 25445.1764977176. The cubic root of 647457007 is about 865.1079674113.

The spelling of 647457007 in words is "six hundred forty-seven million, four hundred fifty-seven thousand, seven".