101939709 has 4 divisors (see below), whose sum is σ = 135919616. Its totient is φ = 67959804.

The previous prime is 101939707. The next prime is 101939729. The reversal of 101939709 is 907939101.

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: 907939101 = 3 ⋅302646367.

It is not a de Polignac number, because 101939709 - 2¹ = 101939707 is a prime.

It is a super-3 number, since 3×101939709³ (a number of 25 digits) contains 333 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 (101939707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16989949 + ... + 16989954.

It is an arithmetic number, because the mean of its divisors is an integer number (33979904).

Almost surely, 2^101939709 is an apocalyptic number.

It is an amenable number.

101939709 is a deficient number, since it is larger than the sum of its proper divisors (33979907).

101939709 is an equidigital number, since it uses as much as digits as its factorization.

101939709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33979906.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 101939709 is about 10096.5196478787. The cubic root of 101939709 is about 467.1407960732.

The spelling of 101939709 in words is "one hundred one million, nine hundred thirty-nine thousand, seven hundred nine".