6367981997 has 8 divisors (see below), whose sum is σ = 6858915840. Its totient is φ = 5877203760.

The previous prime is 6367981981. The next prime is 6367982017. The reversal of 6367981997 is 7991897636.

It is a happy number.

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 6367981997 - 2⁴ = 6367981981 is a prime.

It is a super-2 number, since 2×6367981997² = 81102389428232216018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6367983997) 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, 54404 + ... + 125282.

It is an arithmetic number, because the mean of its divisors is an integer number (857364480).

Almost surely, 2^6367981997 is an apocalyptic number.

It is an amenable number.

6367981997 is a deficient number, since it is larger than the sum of its proper divisors (490933843).

6367981997 is a wasteful number, since it uses less digits than its factorization.

6367981997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77803.

The product of its digits is 30862944, while the sum is 65.

The square root of 6367981997 is about 79799.6365718541. The cubic root of 6367981997 is about 1853.5342224798.

The spelling of 6367981997 in words is "six billion, three hundred sixty-seven million, nine hundred eighty-one thousand, nine hundred ninety-seven".