870221741 has 2 divisors, whose sum is σ = 870221742. Its totient is φ = 870221740.

The previous prime is 870221719. The next prime is 870221773. The reversal of 870221741 is 147122078.

It is a happy number.

It is an a-pointer prime, because the next prime (870221773) can be obtained adding 870221741 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708677641 + 161544100 = 26621^2 + 12710^2 .

It is a cyclic number.

It is not a de Polignac number, because 870221741 - 2¹⁰ = 870220717 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 870221698 and 870221707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870221711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435110870 + 435110871.

It is an arithmetic number, because the mean of its divisors is an integer number (435110871).

Almost surely, 2^870221741 is an apocalyptic number.

It is an amenable number.

870221741 is a deficient number, since it is larger than the sum of its proper divisors (1).

870221741 is an equidigital number, since it uses as much as digits as its factorization.

870221741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 870221741 is about 29499.5210300100. The cubic root of 870221741 is about 954.7213686014.

The spelling of 870221741 in words is "eight hundred seventy million, two hundred twenty-one thousand, seven hundred forty-one".