101199709 has 4 divisors (see below), whose sum is σ = 108984316. Its totient is φ = 93415104.

The previous prime is 101199697. The next prime is 101199733. The reversal of 101199709 is 907991101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907991101 = 97 ⋅9360733.

It can be written as a sum of positive squares in 2 ways, for example, as 12425625 + 88774084 = 3525^2 + 9422^2 .

It is a cyclic number.

It is not a de Polignac number, because 101199709 - 2¹⁵ = 101166941 is a prime.

It is a super-2 number, since 2×101199709² = 20482762203369362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101199799) 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, 3892284 + ... + 3892309.

It is an arithmetic number, because the mean of its divisors is an integer number (27246079).

Almost surely, 2^101199709 is an apocalyptic number.

It is an amenable number.

101199709 is a deficient number, since it is larger than the sum of its proper divisors (7784607).

101199709 is an equidigital number, since it uses as much as digits as its factorization.

101199709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784606.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 101199709 is about 10059.8066084791. The cubic root of 101199709 is about 466.0076948019.

The spelling of 101199709 in words is "one hundred one million, one hundred ninety-nine thousand, seven hundred nine".