542898509 has 4 divisors (see below), whose sum is σ = 566502816. Its totient is φ = 519294204.

The previous prime is 542898497. The next prime is 542898541. The reversal of 542898509 is 905898245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 542898509 - 2¹⁶ = 542832973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542898599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11802119 + ... + 11802164.

It is an arithmetic number, because the mean of its divisors is an integer number (141625704).

Almost surely, 2^542898509 is an apocalyptic number.

It is an amenable number.

542898509 is a deficient number, since it is larger than the sum of its proper divisors (23604307).

542898509 is a wasteful number, since it uses less digits than its factorization.

542898509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604306.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The square root of 542898509 is about 23300.1825958510. The cubic root of 542898509 is about 815.7796791807.

The spelling of 542898509 in words is "five hundred forty-two million, eight hundred ninety-eight thousand, five hundred nine".