6997861729 has 4 divisors (see below), whose sum is σ = 7011886000. Its totient is φ = 6983837460.

The previous prime is 6997861723. The next prime is 6997861751. The reversal of 6997861729 is 9271687996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6997861729 - 2⁵ = 6997861697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6997861723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7011387 + ... + 7012384.

It is an arithmetic number, because the mean of its divisors is an integer number (1752971500).

Almost surely, 2^6997861729 is an apocalyptic number.

It is an amenable number.

6997861729 is a deficient number, since it is larger than the sum of its proper divisors (14024271).

6997861729 is a wasteful number, since it uses less digits than its factorization.

6997861729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14024270.

The product of its digits is 20575296, while the sum is 64.

The square root of 6997861729 is about 83653.2230640278. The cubic root of 6997861729 is about 1912.7363836374.

The spelling of 6997861729 in words is "six billion, nine hundred ninety-seven million, eight hundred sixty-one thousand, seven hundred twenty-nine".