654557899 has 2 divisors, whose sum is σ = 654557900. Its totient is φ = 654557898.

The previous prime is 654557881. The next prime is 654557903. The reversal of 654557899 is 998755456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654557899 - 2²¹ = 652460747 is a prime.

It is not a weakly prime, because it can be changed into another prime (654557399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327278949 + 327278950.

It is an arithmetic number, because the mean of its divisors is an integer number (327278950).

Almost surely, 2^654557899 is an apocalyptic number.

654557899 is a deficient number, since it is larger than the sum of its proper divisors (1).

654557899 is an equidigital number, since it uses as much as digits as its factorization.

654557899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608000, while the sum is 58.

The square root of 654557899 is about 25584.3291684578. The cubic root of 654557899 is about 868.2591246255.

The spelling of 654557899 in words is "six hundred fifty-four million, five hundred fifty-seven thousand, eight hundred ninety-nine".