101678161 has 4 divisors (see below), whose sum is σ = 109499572. Its totient is φ = 93856752.

The previous prime is 101678149. The next prime is 101678179. The reversal of 101678161 is 161876101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161876101 = 659 ⋅245639.

It can be written as a sum of positive squares in 2 ways, for example, as 10112400 + 91565761 = 3180^2 + 9569^2 .

It is a cyclic number.

It is not a de Polignac number, because 101678161 - 2⁹ = 101677649 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (101678111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3910686 + ... + 3910711.

It is an arithmetic number, because the mean of its divisors is an integer number (27374893).

Almost surely, 2^101678161 is an apocalyptic number.

It is an amenable number.

101678161 is a deficient number, since it is larger than the sum of its proper divisors (7821411).

101678161 is an equidigital number, since it uses as much as digits as its factorization.

101678161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821410.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 101678161 is about 10083.5589451344. The cubic root of 101678161 is about 466.7409375554.

The spelling of 101678161 in words is "one hundred one million, six hundred seventy-eight thousand, one hundred sixty-one".