654698213 has 4 divisors (see below), whose sum is σ = 705059628. Its totient is φ = 604336800.

The previous prime is 654698189. The next prime is 654698251. The reversal of 654698213 is 312896456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45941284 + 608756929 = 6778^2 + 24673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654698213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654698293) 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, 25180688 + ... + 25180713.

It is an arithmetic number, because the mean of its divisors is an integer number (176264907).

Almost surely, 2^654698213 is an apocalyptic number.

It is an amenable number.

654698213 is a deficient number, since it is larger than the sum of its proper divisors (50361415).

654698213 is a wasteful number, since it uses less digits than its factorization.

654698213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50361414.

The product of its digits is 311040, while the sum is 44.

The square root of 654698213 is about 25587.0712079362. The cubic root of 654698213 is about 868.3211615142.

The spelling of 654698213 in words is "six hundred fifty-four million, six hundred ninety-eight thousand, two hundred thirteen".