647011097 has 4 divisors (see below), whose sum is σ = 649219620. Its totient is φ = 644802576.

The previous prime is 647011093. The next prime is 647011103. The reversal of 647011097 is 790110746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 582305161 + 64705936 = 24131^2 + 8044^2 .

It is a cyclic number.

It is not a de Polignac number, because 647011097 - 2² = 647011093 is a prime.

It is a super-2 number, since 2×647011097² = 837246719282286818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647011093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103822 + ... + 1104407.

It is an arithmetic number, because the mean of its divisors is an integer number (162304905).

Almost surely, 2^647011097 is an apocalyptic number.

It is an amenable number.

647011097 is a deficient number, since it is larger than the sum of its proper divisors (2208523).

647011097 is a wasteful number, since it uses less digits than its factorization.

647011097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208522.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 647011097 is about 25436.4128170621. The cubic root of 647011097 is about 864.9093190159.

The spelling of 647011097 in words is "six hundred forty-seven million, eleven thousand, ninety-seven".