209979705302 has 4 divisors (see below), whose sum is σ = 314969557956. Its totient is φ = 104989852650.

The previous prime is 209979705301. The next prime is 209979705317. The reversal of 209979705302 is 203507979902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×209979705302² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209979705301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52494926324 + ... + 52494926327.

It is an arithmetic number, because the mean of its divisors is an integer number (78742389489).

Almost surely, 2^209979705302 is an apocalyptic number.

209979705302 is a deficient number, since it is larger than the sum of its proper divisors (104989852654).

209979705302 is a wasteful number, since it uses less digits than its factorization.

209979705302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104989852653.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The spelling of 209979705302 in words is "two hundred nine billion, nine hundred seventy-nine million, seven hundred five thousand, three hundred two".