612198089 has 2 divisors, whose sum is σ = 612198090. Its totient is φ = 612198088.

The previous prime is 612198073. The next prime is 612198131. The reversal of 612198089 is 980891216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427455625 + 184742464 = 20675^2 + 13592^2 .

It is a cyclic number.

It is not a de Polignac number, because 612198089 - 2⁴ = 612198073 is a prime.

It is not a weakly prime, because it can be changed into another prime (612198029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306099044 + 306099045.

It is an arithmetic number, because the mean of its divisors is an integer number (306099045).

Almost surely, 2^612198089 is an apocalyptic number.

It is an amenable number.

612198089 is a deficient number, since it is larger than the sum of its proper divisors (1).

612198089 is an equidigital number, since it uses as much as digits as its factorization.

612198089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 612198089 is about 24742.6370664083. The cubic root of 612198089 is about 849.1100669683.

The spelling of 612198089 in words is "six hundred twelve million, one hundred ninety-eight thousand, eighty-nine".