846374509 has 2 divisors, whose sum is σ = 846374510. Its totient is φ = 846374508.

The previous prime is 846374497. The next prime is 846374527. The reversal of 846374509 is 905473648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696801609 + 149572900 = 26397^2 + 12230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-846374509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (846374549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423187254 + 423187255.

It is an arithmetic number, because the mean of its divisors is an integer number (423187255).

Almost surely, 2^846374509 is an apocalyptic number.

It is an amenable number.

846374509 is a deficient number, since it is larger than the sum of its proper divisors (1).

846374509 is an equidigital number, since it uses as much as digits as its factorization.

846374509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 846374509 is about 29092.5163744905. The cubic root of 846374509 is about 945.9195286197.

The spelling of 846374509 in words is "eight hundred forty-six million, three hundred seventy-four thousand, five hundred nine".