612145613 has 4 divisors (see below), whose sum is σ = 612388128. Its totient is φ = 611903100.

The previous prime is 612145603. The next prime is 612145663. The reversal of 612145613 is 316541216.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-612145613 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 (612145603) 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, 117431 + ... + 122532.

It is an arithmetic number, because the mean of its divisors is an integer number (153097032).

Almost surely, 2^612145613 is an apocalyptic number.

It is an amenable number.

612145613 is a deficient number, since it is larger than the sum of its proper divisors (242515).

612145613 is a wasteful number, since it uses less digits than its factorization.

612145613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242514.

The product of its digits is 4320, while the sum is 29.

The square root of 612145613 is about 24741.5766069990. The cubic root of 612145613 is about 849.0858051191.

Adding to 612145613 its reverse (316541216), we get a palindrome (928686829).

The spelling of 612145613 in words is "six hundred twelve million, one hundred forty-five thousand, six hundred thirteen".