100142709 has 4 divisors (see below), whose sum is σ = 133523616. Its totient is φ = 66761804.

The previous prime is 100142687. The next prime is 100142717. The reversal of 100142709 is 907241001.

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: 907241001 = 3 ⋅302413667.

It is a cyclic number.

It is not a de Polignac number, because 100142709 - 2⁹ = 100142197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100142729) 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, 16690449 + ... + 16690454.

It is an arithmetic number, because the mean of its divisors is an integer number (33380904).

Almost surely, 2^100142709 is an apocalyptic number.

It is an amenable number.

100142709 is a deficient number, since it is larger than the sum of its proper divisors (33380907).

100142709 is an equidigital number, since it uses as much as digits as its factorization.

100142709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33380906.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 100142709 is about 10007.1329060825. The cubic root of 100142709 is about 464.3795772448.

The spelling of 100142709 in words is "one hundred million, one hundred forty-two thousand, seven hundred nine".