873642761 has 2 divisors, whose sum is σ = 873642762. Its totient is φ = 873642760.

The previous prime is 873642709. The next prime is 873642773. The reversal of 873642761 is 167246378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861774736 + 11868025 = 29356^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 873642761 - 2⁶ = 873642697 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 (873642701) 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, 436821380 + 436821381.

It is an arithmetic number, because the mean of its divisors is an integer number (436821381).

Almost surely, 2^873642761 is an apocalyptic number.

It is an amenable number.

873642761 is a deficient number, since it is larger than the sum of its proper divisors (1).

873642761 is an equidigital number, since it uses as much as digits as its factorization.

873642761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 873642761 is about 29557.4484859570. The cubic root of 873642761 is about 955.9708012213.

The spelling of 873642761 in words is "eight hundred seventy-three million, six hundred forty-two thousand, seven hundred sixty-one".