6909249481 has 2 divisors, whose sum is σ = 6909249482. Its totient is φ = 6909249480.

The previous prime is 6909249437. The next prime is 6909249539. The reversal of 6909249481 is 1849429096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6096486400 + 812763081 = 78080^2 + 28509^2 .

It is a cyclic number.

It is not a de Polignac number, because 6909249481 - 2¹³ = 6909241289 is a prime.

It is a super-2 number, since 2×6909249481² = 95475456781397538722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6909249401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454624740 + 3454624741.

It is an arithmetic number, because the mean of its divisors is an integer number (3454624741).

Almost surely, 2^6909249481 is an apocalyptic number.

It is an amenable number.

6909249481 is a deficient number, since it is larger than the sum of its proper divisors (1).

6909249481 is an equidigital number, since it uses as much as digits as its factorization.

6909249481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 6909249481 is about 83121.8953164568. The cubic root of 6909249481 is about 1904.6285565729.

The spelling of 6909249481 in words is "six billion, nine hundred nine million, two hundred forty-nine thousand, four hundred eighty-one".