107720161 has 6 divisors (see below), whose sum is σ = 110413286. Its totient is φ = 105091200.

The previous prime is 107720111. The next prime is 107720167. The reversal of 107720161 is 161027701.

It can be written as a sum of positive squares in 3 ways, for example, as 6838225 + 100881936 = 2615^2 + 10044^2 .

It is not a de Polignac number, because 107720161 - 2⁷ = 107720033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107720167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30360 + ... + 33721.

Almost surely, 2^107720161 is an apocalyptic number.

It is an amenable number.

107720161 is a deficient number, since it is larger than the sum of its proper divisors (2693125).

107720161 is an frugal number, since it uses more digits than its factorization.

107720161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64163 (or 64122 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 107720161 is about 10378.8323524373. The cubic root of 107720161 is about 475.8086480474.

Adding to 107720161 its reverse (161027701), we get a palindrome (268747862).

The spelling of 107720161 in words is "one hundred seven million, seven hundred twenty thousand, one hundred sixty-one".