101669 has 4 divisors (see below), whose sum is σ = 107040. Its totient is φ = 96300.

The previous prime is 101663. The next prime is 101681. The reversal of 101669 is 966101.

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: 966101 = 163 ⋅5927.

It is a cyclic number.

It is not a de Polignac number, because 101669 - 2⁴ = 101653 is a prime.

It is a super-2 number, since 2×101669² = 20673171122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101663) 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, 2657 + ... + 2694.

It is an arithmetic number, because the mean of its divisors is an integer number (26760).

2¹⁰¹⁶⁶⁹ is an apocalyptic number.

101669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

101669 is a deficient number, since it is larger than the sum of its proper divisors (5371).

101669 is an equidigital number, since it uses as much as digits as its factorization.

101669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 101669 is about 318.8557667661. The cubic root of 101669 is about 46.6726919658.

The spelling of 101669 in words is "one hundred one thousand, six hundred sixty-nine".