613500257 has 4 divisors (see below), whose sum is σ = 613740720. Its totient is φ = 613259796.

The previous prime is 613500247. The next prime is 613500263. The reversal of 613500257 is 752005316.

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 613500257 - 2⁶ = 613500193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613500247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116363 + ... + 121520.

It is an arithmetic number, because the mean of its divisors is an integer number (153435180).

Almost surely, 2^613500257 is an apocalyptic number.

It is an amenable number.

613500257 is a deficient number, since it is larger than the sum of its proper divisors (240463).

613500257 is a wasteful number, since it uses less digits than its factorization.

613500257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240462.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 613500257 is about 24768.9373409519. The cubic root of 613500257 is about 849.7116701416.

The spelling of 613500257 in words is "six hundred thirteen million, five hundred thousand, two hundred fifty-seven".