1974407509 has 2 divisors, whose sum is σ = 1974407510. Its totient is φ = 1974407508.

The previous prime is 1974407497. The next prime is 1974407573. The reversal of 1974407509 is 9057044791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137173284 + 837234225 = 33722^2 + 28935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974407509 - 2⁹ = 1974406997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974402509) 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 as a sum of consecutive naturals, namely, 987203754 + 987203755.

It is an arithmetic number, because the mean of its divisors is an integer number (987203755).

Almost surely, 2^1974407509 is an apocalyptic number.

It is an amenable number.

1974407509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974407509 is an equidigital number, since it uses as much as digits as its factorization.

1974407509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 1974407509 is about 44434.3055420021. The cubic root of 1974407509 is about 1254.5238764689.

The spelling of 1974407509 in words is "one billion, nine hundred seventy-four million, four hundred seven thousand, five hundred nine".