6900445309 has 2 divisors, whose sum is σ = 6900445310. Its totient is φ = 6900445308.

The previous prime is 6900445283. The next prime is 6900445313. The reversal of 6900445309 is 9035440096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3803188900 + 3097256409 = 61670^2 + 55653^2 .

It is a cyclic number.

It is not a de Polignac number, because 6900445309 - 2¹⁷ = 6900314237 is a prime.

It is a super-2 number, since 2×6900445309² = 95232290925000210962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6900445369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450222654 + 3450222655.

It is an arithmetic number, because the mean of its divisors is an integer number (3450222655).

Almost surely, 2^6900445309 is an apocalyptic number.

It is an amenable number.

6900445309 is a deficient number, since it is larger than the sum of its proper divisors (1).

6900445309 is an equidigital number, since it uses as much as digits as its factorization.

6900445309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 6900445309 is about 83068.9190311274. The cubic root of 6900445309 is about 1903.8192161351.

The spelling of 6900445309 in words is "six billion, nine hundred million, four hundred forty-five thousand, three hundred nine".