209142933 has 16 divisors (see below), whose sum is σ = 292212096. Its totient is φ = 132802560.

The previous prime is 209142919. The next prime is 209142971. The reversal of 209142933 is 339241902.

209142933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209142933 - 2¹⁰ = 209141909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209142894 and 209142903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209142133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10341 + ... + 22917.

It is an arithmetic number, because the mean of its divisors is an integer number (18263256).

Almost surely, 2^209142933 is an apocalyptic number.

209142933 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

209142933 is a deficient number, since it is larger than the sum of its proper divisors (83069163).

209142933 is a wasteful number, since it uses less digits than its factorization.

209142933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12844.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 209142933 is about 14461.7748910706. The cubic root of 209142933 is about 593.5824674075.

The spelling of 209142933 in words is "two hundred nine million, one hundred forty-two thousand, nine hundred thirty-three".