6992389286921 has 4 divisors (see below), whose sum is σ = 7155002991312. Its totient is φ = 6829775582532.

The previous prime is 6992389286873. The next prime is 6992389286969. The reversal of 6992389286921 is 1296829832996.

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 an interprime number because it is at equal distance from previous prime (6992389286873) and next prime (6992389286969).

It is a cyclic number.

It is not a de Polignac number, because 6992389286921 - 2¹⁰ = 6992389285897 is a prime.

It is a super-3 number, since 3×6992389286921³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6992389186921) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 81306852131 + ... + 81306852216.

It is an arithmetic number, because the mean of its divisors is an integer number (1788750747828).

Almost surely, 2^{6992389286921} is an apocalyptic number.

It is an amenable number.

6992389286921 is a deficient number, since it is larger than the sum of its proper divisors (162613704391).

6992389286921 is a wasteful number, since it uses less digits than its factorization.

6992389286921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162613704390.

The product of its digits is 362797056, while the sum is 74.

The spelling of 6992389286921 in words is "six trillion, nine hundred ninety-two billion, three hundred eighty-nine million, two hundred eighty-six thousand, nine hundred twenty-one".