647198043 has 8 divisors (see below), whose sum is σ = 886253328. Its totient is φ = 419804064.

The previous prime is 647198023. The next prime is 647198047. The reversal of 647198043 is 340891746.

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

It is not a de Polignac number, because 647198043 - 2¹⁸ = 646935899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647197986 and 647198004.

It is not an unprimeable number, because it can be changed into a prime (647198047) 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 7 ways as a sum of consecutive naturals, for example, 2915196 + ... + 2915417.

It is an arithmetic number, because the mean of its divisors is an integer number (110781666).

Almost surely, 2^647198043 is an apocalyptic number.

647198043 is a deficient number, since it is larger than the sum of its proper divisors (239055285).

647198043 is a wasteful number, since it uses less digits than its factorization.

647198043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830653.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 647198043 is about 25440.0873229633. The cubic root of 647198043 is about 864.9926126759.

The spelling of 647198043 in words is "six hundred forty-seven million, one hundred ninety-eight thousand, forty-three".