109698961 has 2 divisors, whose sum is σ = 109698962. Its totient is φ = 109698960.

The previous prime is 109698947. The next prime is 109698991. The reversal of 109698961 is 169896901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105698961 + 4000000 = 10281^2 + 2000^2 .

It is an emirp because it is prime and its reverse (169896901) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 196869601 and 106968691.

It is a cyclic number.

It is not a de Polignac number, because 109698961 - 2¹³ = 109690769 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (109698991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54849480 + 54849481.

It is an arithmetic number, because the mean of its divisors is an integer number (54849481).

Almost surely, 2^109698961 is an apocalyptic number.

It is an amenable number.

109698961 is a deficient number, since it is larger than the sum of its proper divisors (1).

109698961 is an equidigital number, since it uses as much as digits as its factorization.

109698961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 109698961 is about 10473.7271780393. The cubic root of 109698961 is about 478.7044941716.

The spelling of 109698961 in words is "one hundred nine million, six hundred ninety-eight thousand, nine hundred sixty-one".