601621613 has 2 divisors, whose sum is σ = 601621614. Its totient is φ = 601621612.

The previous prime is 601621597. The next prime is 601621637. The reversal of 601621613 is 316126106.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 567725929 + 33895684 = 23827^2 + 5822^2 .

It is a cyclic number.

It is not a de Polignac number, because 601621613 - 2⁴ = 601621597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (601621673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300810806 + 300810807.

It is an arithmetic number, because the mean of its divisors is an integer number (300810807).

Almost surely, 2^601621613 is an apocalyptic number.

It is an amenable number.

601621613 is a deficient number, since it is larger than the sum of its proper divisors (1).

601621613 is an equidigital number, since it uses as much as digits as its factorization.

601621613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 601621613 is about 24527.9761293100. The cubic root of 601621613 is about 844.1918269943.

Adding to 601621613 its reverse (316126106), we get a palindrome (917747719).

The spelling of 601621613 in words is "six hundred one million, six hundred twenty-one thousand, six hundred thirteen".