654432019 has 2 divisors, whose sum is σ = 654432020. Its totient is φ = 654432018.

The previous prime is 654432001. The next prime is 654432091. The reversal of 654432019 is 910234456.

It is a happy number.

Together with next prime (654432091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654432019 - 2²⁷ = 520214291 is a prime.

It is a super-2 number, since 2×654432019² = 856562534984832722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (654432619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327216009 + 327216010.

It is an arithmetic number, because the mean of its divisors is an integer number (327216010).

Almost surely, 2^654432019 is an apocalyptic number.

654432019 is a deficient number, since it is larger than the sum of its proper divisors (1).

654432019 is an equidigital number, since it uses as much as digits as its factorization.

654432019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 654432019 is about 25581.8689504891. The cubic root of 654432019 is about 868.2034618818.

The spelling of 654432019 in words is "six hundred fifty-four million, four hundred thirty-two thousand, nineteen".