6397288994 has 4 divisors (see below), whose sum is σ = 9595933494. Its totient is φ = 3198644496.

The previous prime is 6397288981. The next prime is 6397289021. The reversal of 6397288994 is 4998827936.

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

It can be written as a sum of positive squares in only one way, i.e., 6338229769 + 59059225 = 79613^2 + 7685^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6397288994.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1599322247 + ... + 1599322250.

Almost surely, 2^6397288994 is an apocalyptic number.

6397288994 is a deficient number, since it is larger than the sum of its proper divisors (3198644500).

6397288994 is a wasteful number, since it uses less digits than its factorization.

6397288994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198644499.

The product of its digits is 47029248, while the sum is 65.

The square root of 6397288994 is about 79983.0544177953. The cubic root of 6397288994 is about 1856.3733427712.

The spelling of 6397288994 in words is "six billion, three hundred ninety-seven million, two hundred eighty-eight thousand, nine hundred ninety-four".