209132664 has 32 divisors (see below), whose sum is σ = 563050320. Its totient is φ = 64348416.

The previous prime is 209132653. The next prime is 209132669. The reversal of 209132664 is 466231902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209132669) 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, 334837 + ... + 335460.

Almost surely, 2^209132664 is an apocalyptic number.

209132664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

209132664 is an abundant number, since it is smaller than the sum of its proper divisors (353917656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209132664 is a wasteful number, since it uses less digits than its factorization.

209132664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670319 (or 670315 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 209132664 is about 14461.4198473041. The cubic root of 209132664 is about 593.5727522045.

The spelling of 209132664 in words is "two hundred nine million, one hundred thirty-two thousand, six hundred sixty-four".