1873309961 has 2 divisors, whose sum is σ = 1873309962. Its totient is φ = 1873309960.

The previous prime is 1873309927. The next prime is 1873309969. The reversal of 1873309961 is 1699033781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214104336 + 659205625 = 34844^2 + 25675^2 .

It is an emirp because it is prime and its reverse (1699033781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1873309961 - 2¹⁰ = 1873308937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1873309969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936654980 + 936654981.

It is an arithmetic number, because the mean of its divisors is an integer number (936654981).

Almost surely, 2^1873309961 is an apocalyptic number.

It is an amenable number.

1873309961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873309961 is an equidigital number, since it uses as much as digits as its factorization.

1873309961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1873309961 is about 43281.7509003506. The cubic root of 1873309961 is about 1232.7354373879.

The spelling of 1873309961 in words is "one billion, eight hundred seventy-three million, three hundred nine thousand, nine hundred sixty-one".