613012891 has 4 divisors (see below), whose sum is σ = 623403000. Its totient is φ = 602622784.

The previous prime is 613012889. The next prime is 613012927. The reversal of 613012891 is 198210316.

613012891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 613012891 - 2¹ = 613012889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613012801) 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, 5194966 + ... + 5195083.

It is an arithmetic number, because the mean of its divisors is an integer number (155850750).

Almost surely, 2^613012891 is an apocalyptic number.

613012891 is a deficient number, since it is larger than the sum of its proper divisors (10390109).

613012891 is a wasteful number, since it uses less digits than its factorization.

613012891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10390108.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 613012891 is about 24759.0971362043. The cubic root of 613012891 is about 849.4866062393.

The spelling of 613012891 in words is "six hundred thirteen million, twelve thousand, eight hundred ninety-one".