863738508109 has 2 divisors, whose sum is σ = 863738508110. Its totient is φ = 863738508108.

The previous prime is 863738508079. The next prime is 863738508119. The reversal of 863738508109 is 901805837368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450077290884 + 413661217225 = 670878^2 + 643165^2 .

It is a cyclic number.

It is not a de Polignac number, because 863738508109 - 2⁷ = 863738507981 is a prime.

It is a super-2 number, since 2×863738508109² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863738508119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431869254054 + 431869254055.

It is an arithmetic number, because the mean of its divisors is an integer number (431869254055).

Almost surely, 2^863738508109 is an apocalyptic number.

It is an amenable number.

863738508109 is a deficient number, since it is larger than the sum of its proper divisors (1).

863738508109 is an equidigital number, since it uses as much as digits as its factorization.

863738508109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 863738508109 in words is "eight hundred sixty-three billion, seven hundred thirty-eight million, five hundred eight thousand, one hundred nine".