654538019 has 4 divisors (see below), whose sum is σ = 655107840. Its totient is φ = 653968200.

The previous prime is 654537997. The next prime is 654538021. The reversal of 654538019 is 910835456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 654538019 - 2¹² = 654533923 is a prime.

It is a super-2 number, since 2×654538019² = 856840036632888722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654538519) 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, 283184 + ... + 285485.

It is an arithmetic number, because the mean of its divisors is an integer number (163776960).

Almost surely, 2^654538019 is an apocalyptic number.

654538019 is a deficient number, since it is larger than the sum of its proper divisors (569821).

654538019 is a wasteful number, since it uses less digits than its factorization.

654538019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569820.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 654538019 is about 25583.9406464290. The cubic root of 654538019 is about 868.2503343839.

The spelling of 654538019 in words is "six hundred fifty-four million, five hundred thirty-eight thousand, nineteen".