6398976247 has 4 divisors (see below), whose sum is σ = 6399155520. Its totient is φ = 6398796976.

The previous prime is 6398976223. The next prime is 6398976251. The reversal of 6398976247 is 7426798936.

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 6398976247 - 2¹⁵ = 6398943479 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 (6398976547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15847 + ... + 114232.

It is an arithmetic number, because the mean of its divisors is an integer number (1599788880).

Almost surely, 2^6398976247 is an apocalyptic number.

6398976247 is a deficient number, since it is larger than the sum of its proper divisors (179273).

6398976247 is a wasteful number, since it uses less digits than its factorization.

6398976247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179272.

The product of its digits is 27433728, while the sum is 61.

The square root of 6398976247 is about 79993.6012878530. The cubic root of 6398976247 is about 1856.5365314892.

The spelling of 6398976247 in words is "six billion, three hundred ninety-eight million, nine hundred seventy-six thousand, two hundred forty-seven".