609892981 has 2 divisors, whose sum is σ = 609892982. Its totient is φ = 609892980.

The previous prime is 609892967. The next prime is 609892991. The reversal of 609892981 is 189298906.

609892981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582498225 + 27394756 = 24135^2 + 5234^2 .

It is a cyclic number.

It is not a de Polignac number, because 609892981 - 2⁵ = 609892949 is a prime.

It is a super-3 number, since 3×609892981³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609892961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304946490 + 304946491.

It is an arithmetic number, because the mean of its divisors is an integer number (304946491).

Almost surely, 2^609892981 is an apocalyptic number.

It is an amenable number.

609892981 is a deficient number, since it is larger than the sum of its proper divisors (1).

609892981 is an equidigital number, since it uses as much as digits as its factorization.

609892981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 609892981 is about 24696.0114390968. The cubic root of 609892981 is about 848.0430092143.

The spelling of 609892981 in words is "six hundred nine million, eight hundred ninety-two thousand, nine hundred eighty-one".