613021247 has 4 divisors (see below), whose sum is σ = 613072056. Its totient is φ = 612970440.

The previous prime is 613021243. The next prime is 613021261. The reversal of 613021247 is 742120316.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 613021247 - 2² = 613021243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613021243) 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, 4172 + ... + 35262.

It is an arithmetic number, because the mean of its divisors is an integer number (153268014).

Almost surely, 2^613021247 is an apocalyptic number.

613021247 is a deficient number, since it is larger than the sum of its proper divisors (50809).

613021247 is a wasteful number, since it uses less digits than its factorization.

613021247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50808.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 613021247 is about 24759.2658816856. The cubic root of 613021247 is about 849.4904660156.

The spelling of 613021247 in words is "six hundred thirteen million, twenty-one thousand, two hundred forty-seven".