6974509 has 2 divisors, whose sum is σ = 6974510. Its totient is φ = 6974508.

The previous prime is 6974507. The next prime is 6974519. The reversal of 6974509 is 9054796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6812100 + 162409 = 2610^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 6974509 - 2¹ = 6974507 is a prime.

Together with 6974507, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6974503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3487254 + 3487255.

It is an arithmetic number, because the mean of its divisors is an integer number (3487255).

Almost surely, 2^6974509 is an apocalyptic number.

It is an amenable number.

6974509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6974509 is an equidigital number, since it uses as much as digits as its factorization.

6974509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 6974509 is about 2640.9295711927. The cubic root of 6974509 is about 191.0606333269.

The spelling of 6974509 in words is "six million, nine hundred seventy-four thousand, five hundred nine".