209948067793 has 4 divisors (see below), whose sum is σ = 213506509680. Its totient is φ = 206389625908.

The previous prime is 209948067787. The next prime is 209948067809. The reversal of 209948067793 is 397760849902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209948067793 - 2³³ = 201358133201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209948067733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779220855 + ... + 1779220972.

It is an arithmetic number, because the mean of its divisors is an integer number (53376627420).

Almost surely, 2^209948067793 is an apocalyptic number.

It is an amenable number.

209948067793 is a deficient number, since it is larger than the sum of its proper divisors (3558441887).

209948067793 is an equidigital number, since it uses as much as digits as its factorization.

209948067793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558441886.

The product of its (nonzero) digits is 41150592, while the sum is 64.

The spelling of 209948067793 in words is "two hundred nine billion, nine hundred forty-eight million, sixty-seven thousand, seven hundred ninety-three".