209129473 has 8 divisors (see below), whose sum is σ = 239857920. Its totient is φ = 178614240.

The previous prime is 209129443. The next prime is 209129483. The reversal of 209129473 is 374921902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209129473 - 2¹³ = 209121281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209129443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51193 + ... + 55126.

It is an arithmetic number, because the mean of its divisors is an integer number (29982240).

Almost surely, 2^209129473 is an apocalyptic number.

It is an amenable number.

209129473 is a deficient number, since it is larger than the sum of its proper divisors (30728447).

209129473 is a wasteful number, since it uses less digits than its factorization.

209129473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106607.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 209129473 is about 14461.3095188506. The cubic root of 209129473 is about 593.5697332272.

The spelling of 209129473 in words is "two hundred nine million, one hundred twenty-nine thousand, four hundred seventy-three".