109737312781 has 2 divisors, whose sum is σ = 109737312782. Its totient is φ = 109737312780.

The previous prime is 109737312767. The next prime is 109737312787. The reversal of 109737312781 is 187213737901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79110562756 + 30626750025 = 281266^2 + 175005^2 .

It is a cyclic number.

It is not a de Polignac number, because 109737312781 - 2¹¹ = 109737310733 is a prime.

It is a super-2 number, since 2×109737312781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109737312787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54868656390 + 54868656391.

It is an arithmetic number, because the mean of its divisors is an integer number (54868656391).

Almost surely, 2^109737312781 is an apocalyptic number.

It is an amenable number.

109737312781 is a deficient number, since it is larger than the sum of its proper divisors (1).

109737312781 is an equidigital number, since it uses as much as digits as its factorization.

109737312781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 49.

The spelling of 109737312781 in words is "one hundred nine billion, seven hundred thirty-seven million, three hundred twelve thousand, seven hundred eighty-one".