109948628981 has 2 divisors, whose sum is σ = 109948628982. Its totient is φ = 109948628980.

The previous prime is 109948628947. The next prime is 109948629013. The reversal of 109948628981 is 189826849901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104722784881 + 5225844100 = 323609^2 + 72290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109948628981 is a prime.

It is a super-2 number, since 2×109948628981² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109948628921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54974314490 + 54974314491.

It is an arithmetic number, because the mean of its divisors is an integer number (54974314491).

Almost surely, 2^109948628981 is an apocalyptic number.

It is an amenable number.

109948628981 is a deficient number, since it is larger than the sum of its proper divisors (1).

109948628981 is an equidigital number, since it uses as much as digits as its factorization.

109948628981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 65.

The spelling of 109948628981 in words is "one hundred nine billion, nine hundred forty-eight million, six hundred twenty-eight thousand, nine hundred eighty-one".