611355197 has 2 divisors, whose sum is σ = 611355198. Its totient is φ = 611355196.

The previous prime is 611355137. The next prime is 611355233. The reversal of 611355197 is 791553116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513067801 + 98287396 = 22651^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 611355197 - 2¹⁰ = 611354173 is a prime.

It is equal to p_31886327 and since 611355197 and 31886327 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 611355197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611355127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305677598 + 305677599.

It is an arithmetic number, because the mean of its divisors is an integer number (305677599).

Almost surely, 2^611355197 is an apocalyptic number.

It is an amenable number.

611355197 is a deficient number, since it is larger than the sum of its proper divisors (1).

611355197 is an equidigital number, since it uses as much as digits as its factorization.

611355197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 38.

The square root of 611355197 is about 24725.5980109683. The cubic root of 611355197 is about 848.7201949012.

The spelling of 611355197 in words is "six hundred eleven million, three hundred fifty-five thousand, one hundred ninety-seven".