647819054 has 4 divisors (see below), whose sum is σ = 971728584. Its totient is φ = 323909526.

The previous prime is 647819033. The next prime is 647819057. The reversal of 647819054 is 450918746.

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

It is a junction number, because it is equal to n+sod(n) for n = 647818996 and 647819014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647819057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161954762 + ... + 161954765.

It is an arithmetic number, because the mean of its divisors is an integer number (242932146).

Almost surely, 2^647819054 is an apocalyptic number.

647819054 is a deficient number, since it is larger than the sum of its proper divisors (323909530).

647819054 is a wasteful number, since it uses less digits than its factorization.

647819054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323909529.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 647819054 is about 25452.2897594696. The cubic root of 647819054 is about 865.2691886087.

The spelling of 647819054 in words is "six hundred forty-seven million, eight hundred nineteen thousand, fifty-four".