101669993 has 4 divisors (see below), whose sum is σ = 101692500. Its totient is φ = 101647488.

The previous prime is 101669983. The next prime is 101669999. The reversal of 101669993 is 399966101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399966101 = 601 ⋅665501.

It can be written as a sum of positive squares in 2 ways, for example, as 86638864 + 15031129 = 9308^2 + 3877^2 .

It is a cyclic number.

It is not a de Polignac number, because 101669993 - 2⁶ = 101669929 is a prime.

It is a super-3 number, since 3×101669993³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101669999) 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, 1868 + ... + 14381.

It is an arithmetic number, because the mean of its divisors is an integer number (25423125).

Almost surely, 2^101669993 is an apocalyptic number.

It is an amenable number.

101669993 is a deficient number, since it is larger than the sum of its proper divisors (22507).

101669993 is an equidigital number, since it uses as much as digits as its factorization.

101669993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22506.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 101669993 is about 10083.1539212689. The cubic root of 101669993 is about 466.7284391584.

The spelling of 101669993 in words is "one hundred one million, six hundred sixty-nine thousand, nine hundred ninety-three".