209730498747 has 48 divisors (see below), whose sum is σ = 351463203840. Its totient is φ = 108895374720.

The previous prime is 209730498743. The next prime is 209730498749. The reversal of 209730498747 is 747894037902.

It is not a de Polignac number, because 209730498747 - 2² = 209730498743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209730498743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5222079 + ... + 5262087.

It is an arithmetic number, because the mean of its divisors is an integer number (7322150080).

Almost surely, 2^209730498747 is an apocalyptic number.

209730498747 is a deficient number, since it is larger than the sum of its proper divisors (141732705093).

209730498747 is a wasteful number, since it uses less digits than its factorization.

209730498747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42104 (or 42093 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 60.

The spelling of 209730498747 in words is "two hundred nine billion, seven hundred thirty million, four hundred ninety-eight thousand, seven hundred forty-seven".