509946549 has 16 divisors (see below), whose sum is σ = 791724672. Its totient is φ = 285899328.

The previous prime is 509946523. The next prime is 509946551. The reversal of 509946549 is 945649905.

It is not a de Polignac number, because 509946549 - 2⁷ = 509946421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509946509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227974 + ... + 230199.

It is an arithmetic number, because the mean of its divisors is an integer number (49482792).

Almost surely, 2^509946549 is an apocalyptic number.

It is an amenable number.

509946549 is a deficient number, since it is larger than the sum of its proper divisors (281778123).

509946549 is a wasteful number, since it uses less digits than its factorization.

509946549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458236.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The square root of 509946549 is about 22581.9961252322. The cubic root of 509946549 is about 798.9290612734.

The spelling of 509946549 in words is "five hundred nine million, nine hundred forty-six thousand, five hundred forty-nine".