611523989 has 2 divisors, whose sum is σ = 611523990. Its totient is φ = 611523988.

The previous prime is 611523973. The next prime is 611524037. The reversal of 611523989 is 989325116.

It is a happy number.

611523989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514836100 + 96687889 = 22690^2 + 9833^2 .

It is a cyclic number.

It is not a de Polignac number, because 611523989 - 2⁴ = 611523973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611523959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305761994 + 305761995.

It is an arithmetic number, because the mean of its divisors is an integer number (305761995).

Almost surely, 2^611523989 is an apocalyptic number.

It is an amenable number.

611523989 is a deficient number, since it is larger than the sum of its proper divisors (1).

611523989 is an equidigital number, since it uses as much as digits as its factorization.

611523989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 611523989 is about 24729.0110801059. The cubic root of 611523989 is about 848.7982967956.

The spelling of 611523989 in words is "six hundred eleven million, five hundred twenty-three thousand, nine hundred eighty-nine".