608518921 has 2 divisors, whose sum is σ = 608518922. Its totient is φ = 608518920.

The previous prime is 608518907. The next prime is 608518931. The reversal of 608518921 is 129815806.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557196025 + 51322896 = 23605^2 + 7164^2 .

It is a cyclic number.

It is not a de Polignac number, because 608518921 - 2¹³ = 608510729 is a prime.

It is not a weakly prime, because it can be changed into another prime (608518901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304259460 + 304259461.

It is an arithmetic number, because the mean of its divisors is an integer number (304259461).

Almost surely, 2^608518921 is an apocalyptic number.

It is an amenable number.

608518921 is a deficient number, since it is larger than the sum of its proper divisors (1).

608518921 is an equidigital number, since it uses as much as digits as its factorization.

608518921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 608518921 is about 24668.1762803820. The cubic root of 608518921 is about 847.4056634264.

The spelling of 608518921 in words is "six hundred eight million, five hundred eighteen thousand, nine hundred twenty-one".