209072019 has 8 divisors (see below), whose sum is σ = 300206032. Its totient is φ = 128659680.

The previous prime is 209072009. The next prime is 209072021. The reversal of 209072019 is 910270902.

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

It is not a de Polignac number, because 209072019 - 2¹⁵ = 209039251 is a prime.

It is a super-2 number, since 2×209072019² = 87422218257472722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209072009) 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, 2680372 + ... + 2680449.

It is an arithmetic number, because the mean of its divisors is an integer number (37525754).

Almost surely, 2^209072019 is an apocalyptic number.

209072019 is a deficient number, since it is larger than the sum of its proper divisors (91134013).

209072019 is a wasteful number, since it uses less digits than its factorization.

209072019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360837.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 209072019 is about 14459.3229094588. The cubic root of 209072019 is about 593.5153712436.

The spelling of 209072019 in words is "two hundred nine million, seventy-two thousand, nineteen".