1611219601 has 2 divisors, whose sum is σ = 1611219602. Its totient is φ = 1611219600.

The previous prime is 1611219593. The next prime is 1611219607. The reversal of 1611219601 is 1069121161.

It is a Cunningham number, because it is equal to 40140²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1611219600 + 1 = 40140^2 + 1^2 .

It is an emirp because it is prime and its reverse (1069121161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1611219601 - 2³ = 1611219593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1611219601.

It is not a weakly prime, because it can be changed into another prime (1611219607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805609800 + 805609801.

It is an arithmetic number, because the mean of its divisors is an integer number (805609801).

Almost surely, 2^1611219601 is an apocalyptic number.

It is an amenable number.

1611219601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611219601 is an equidigital number, since it uses as much as digits as its factorization.

1611219601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1611219601 is about 40140.0000124564. Note that the first 4 decimals coincide. The cubic root of 1611219601 is about 1172.3345892561.

The spelling of 1611219601 in words is "one billion, six hundred eleven million, two hundred nineteen thousand, six hundred one".