210297364993 has 4 divisors (see below), whose sum is σ = 210521802820. Its totient is φ = 210072927168.

The previous prime is 210297364967. The next prime is 210297365023. The reversal of 210297364993 is 399463792012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37567355329 + 172730009664 = 193823^2 + 415608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210297364993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210297364913) 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, 112217508 + ... + 112219381.

It is an arithmetic number, because the mean of its divisors is an integer number (52630450705).

Almost surely, 2^210297364993 is an apocalyptic number.

It is an amenable number.

210297364993 is a deficient number, since it is larger than the sum of its proper divisors (224437827).

210297364993 is an equidigital number, since it uses as much as digits as its factorization.

210297364993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224437826.

The product of its (nonzero) digits is 4408992, while the sum is 55.

The spelling of 210297364993 in words is "two hundred ten billion, two hundred ninety-seven million, three hundred sixty-four thousand, nine hundred ninety-three".