209948697 has 24 divisors (see below), whose sum is σ = 347957376. Its totient is φ = 119494656.

The previous prime is 209948663. The next prime is 209948701. The reversal of 209948697 is 796849902.

It is not a de Polignac number, because 209948697 - 2⁷ = 209948569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209940697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9708 + ... + 22674.

It is an arithmetic number, because the mean of its divisors is an integer number (14498224).

Almost surely, 2^209948697 is an apocalyptic number.

It is an amenable number.

209948697 is a deficient number, since it is larger than the sum of its proper divisors (138008679).

209948697 is a wasteful number, since it uses less digits than its factorization.

209948697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13237 (or 13234 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 209948697 is about 14489.6065163965. The cubic root of 209948697 is about 594.3437879964.

The spelling of 209948697 in words is "two hundred nine million, nine hundred forty-eight thousand, six hundred ninety-seven".