654379217 has 4 divisors (see below), whose sum is σ = 675488256. Its totient is φ = 633270180.

The previous prime is 654379213. The next prime is 654379223. The reversal of 654379217 is 712973456.

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 654379217 - 2² = 654379213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654379213) 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, 10554473 + ... + 10554534.

It is an arithmetic number, because the mean of its divisors is an integer number (168872064).

Almost surely, 2^654379217 is an apocalyptic number.

It is an amenable number.

654379217 is a deficient number, since it is larger than the sum of its proper divisors (21109039).

654379217 is a wasteful number, since it uses less digits than its factorization.

654379217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21109038.

The product of its digits is 317520, while the sum is 44.

The square root of 654379217 is about 25580.8369096869. The cubic root of 654379217 is about 868.1801112964.

The spelling of 654379217 in words is "six hundred fifty-four million, three hundred seventy-nine thousand, two hundred seventeen".