612001613 has 4 divisors (see below), whose sum is σ = 612954048. Its totient is φ = 611049180.

The previous prime is 612001573. The next prime is 612001619. The reversal of 612001613 is 316100216.

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 612001613 - 2¹⁰ = 612000589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612001619) 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, 475253 + ... + 476538.

It is an arithmetic number, because the mean of its divisors is an integer number (153238512).

Almost surely, 2^612001613 is an apocalyptic number.

It is an amenable number.

612001613 is a deficient number, since it is larger than the sum of its proper divisors (952435).

612001613 is an equidigital number, since it uses as much as digits as its factorization.

612001613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952434.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 612001613 is about 24738.6663545147. Note that the first 3 decimals coincide. The cubic root of 612001613 is about 849.0192207738.

Adding to 612001613 its reverse (316100216), we get a palindrome (928101829).

The spelling of 612001613 in words is "six hundred twelve million, one thousand, six hundred thirteen".