101661841 has 4 divisors (see below), whose sum is σ = 101710192. Its totient is φ = 101613492.

The previous prime is 101661827. The next prime is 101661869. The reversal of 101661841 is 148166101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 148166101 = 17 ⋅8715653.

It is a cyclic number.

It is not a de Polignac number, because 101661841 - 2¹³ = 101653649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101661871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20871 + ... + 25276.

It is an arithmetic number, because the mean of its divisors is an integer number (25427548).

Almost surely, 2^101661841 is an apocalyptic number.

It is an amenable number.

101661841 is a deficient number, since it is larger than the sum of its proper divisors (48351).

101661841 is an equidigital number, since it uses as much as digits as its factorization.

101661841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48350.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 101661841 is about 10082.7496745679. The cubic root of 101661841 is about 466.7159645766.

The spelling of 101661841 in words is "one hundred one million, six hundred sixty-one thousand, eight hundred forty-one".