6940799989 has 2 divisors, whose sum is σ = 6940799990. Its totient is φ = 6940799988.

The previous prime is 6940799981. The next prime is 6940800043. The reversal of 6940799989 is 9899970496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5927460100 + 1013339889 = 76990^2 + 31833^2 .

It is a cyclic number.

It is not a de Polignac number, because 6940799989 - 2³ = 6940799981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6940799981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470399994 + 3470399995.

It is an arithmetic number, because the mean of its divisors is an integer number (3470399995).

Almost surely, 2^6940799989 is an apocalyptic number.

It is an amenable number.

6940799989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6940799989 is an equidigital number, since it uses as much as digits as its factorization.

6940799989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 70.

The square root of 6940799989 is about 83311.4637309896. The cubic root of 6940799989 is about 1907.5232637169.

The spelling of 6940799989 in words is "six billion, nine hundred forty million, seven hundred ninety-nine thousand, nine hundred eighty-nine".