209239149 has 8 divisors (see below), whose sum is σ = 318840640. Its totient is φ = 119565216.

The previous prime is 209239133. The next prime is 209239169. The reversal of 209239149 is 941932902.

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

It is not a de Polignac number, because 209239149 - 2⁴ = 209239133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209239169) 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, 4981864 + ... + 4981905.

It is an arithmetic number, because the mean of its divisors is an integer number (39855080).

Almost surely, 2^209239149 is an apocalyptic number.

It is an amenable number.

209239149 is a deficient number, since it is larger than the sum of its proper divisors (109601491).

209239149 is an equidigital number, since it uses as much as digits as its factorization.

209239149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9963779.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 209239149 is about 14465.1010711989. The cubic root of 209239149 is about 593.6734791285.

The spelling of 209239149 in words is "two hundred nine million, two hundred thirty-nine thousand, one hundred forty-nine".