861248693 has 2 divisors, whose sum is σ = 861248694. Its totient is φ = 861248692.

The previous prime is 861248683. The next prime is 861248711. The reversal of 861248693 is 396842168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624150289 + 237098404 = 24983^2 + 15398^2 .

It is a cyclic number.

It is not a de Polignac number, because 861248693 - 2⁶ = 861248629 is a prime.

It is a super-2 number, since 2×861248693² = 1483498622388416498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861248623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430624346 + 430624347.

It is an arithmetic number, because the mean of its divisors is an integer number (430624347).

Almost surely, 2^861248693 is an apocalyptic number.

It is an amenable number.

861248693 is a deficient number, since it is larger than the sum of its proper divisors (1).

861248693 is an equidigital number, since it uses as much as digits as its factorization.

861248693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The square root of 861248693 is about 29347.0389136621. The cubic root of 861248693 is about 951.4285775469.

The spelling of 861248693 in words is "eight hundred sixty-one million, two hundred forty-eight thousand, six hundred ninety-three".