647370849 has 8 divisors (see below), whose sum is σ = 863493120. Its totient is φ = 431414576.

The previous prime is 647370847. The next prime is 647370851. The reversal of 647370849 is 948073746.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (647370847) and next prime (647370851).

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

It is a cyclic number.

It is not a de Polignac number, because 647370849 - 2¹ = 647370847 is a prime.

It is a super-2 number, since 2×647370849² = 838178032269961602, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 647370798 and 647370807.

It is not an unprimeable number, because it can be changed into a prime (647370847) 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, 32094 + ... + 48215.

It is an arithmetic number, because the mean of its divisors is an integer number (107936640).

Almost surely, 2^647370849 is an apocalyptic number.

It is an amenable number.

647370849 is a deficient number, since it is larger than the sum of its proper divisors (216122271).

647370849 is a wasteful number, since it uses less digits than its factorization.

647370849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82999.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 647370849 is about 25443.4834289647. The cubic root of 647370849 is about 865.0695920042.

The spelling of 647370849 in words is "six hundred forty-seven million, three hundred seventy thousand, eight hundred forty-nine".