613897209 has 12 divisors (see below), whose sum is σ = 925294656. Its totient is φ = 391470552.

The previous prime is 613897187. The next prime is 613897231. The reversal of 613897209 is 902798316.

613897209 is a `hidden beast` number, since 61 + 389 + 7 + 209 = 666.

It is an interprime number because it is at equal distance from previous prime (613897187) and next prime (613897231).

It is not a de Polignac number, because 613897209 - 2⁸ = 613896953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (613897709) 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 11 ways as a sum of consecutive naturals, for example, 1482637 + ... + 1483050.

It is an arithmetic number, because the mean of its divisors is an integer number (77107888).

Almost surely, 2^613897209 is an apocalyptic number.

613897209 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

613897209 is a deficient number, since it is larger than the sum of its proper divisors (311397447).

613897209 is a wasteful number, since it uses less digits than its factorization.

613897209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965716 (or 2965713 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 613897209 is about 24776.9491463336. The cubic root of 613897209 is about 849.8948931166.

The spelling of 613897209 in words is "six hundred thirteen million, eight hundred ninety-seven thousand, two hundred nine".