209429701 has 6 divisors (see below), whose sum is σ = 226779090. Its totient is φ = 193319568.

The previous prime is 209429699. The next prime is 209429719. The reversal of 209429701 is 107924902.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 656100 + 208773601 = 810^2 + 14449^2 .

It is not a de Polignac number, because 209429701 - 2¹ = 209429699 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 (209429201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 619446 + ... + 619783.

It is an arithmetic number, because the mean of its divisors is an integer number (37796515).

Almost surely, 2^209429701 is an apocalyptic number.

It is an amenable number.

209429701 is a deficient number, since it is larger than the sum of its proper divisors (17349389).

209429701 is a wasteful number, since it uses less digits than its factorization.

209429701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239255 (or 1239242 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 209429701 is about 14471.6861837175. The cubic root of 209429701 is about 593.8536419484.

The spelling of 209429701 in words is "two hundred nine million, four hundred twenty-nine thousand, seven hundred one".