654211217 has 4 divisors (see below), whose sum is σ = 713684976. Its totient is φ = 594737460.

The previous prime is 654211213. The next prime is 654211231. The reversal of 654211217 is 712112456.

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 654211217 - 2² = 654211213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 654211217.

It is not an unprimeable number, because it can be changed into a prime (654211213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29736863 + ... + 29736884.

It is an arithmetic number, because the mean of its divisors is an integer number (178421244).

Almost surely, 2^654211217 is an apocalyptic number.

It is an amenable number.

654211217 is a deficient number, since it is larger than the sum of its proper divisors (59473759).

654211217 is a wasteful number, since it uses less digits than its factorization.

654211217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59473758.

The product of its digits is 3360, while the sum is 29.

The square root of 654211217 is about 25577.5529908551. The cubic root of 654211217 is about 868.1058084363.

The spelling of 654211217 in words is "six hundred fifty-four million, two hundred eleven thousand, two hundred seventeen".