210994001 has 4 divisors (see below), whose sum is σ = 211028532. Its totient is φ = 210959472.

The previous prime is 210993941. The next prime is 210994013. The reversal of 210994001 is 100499012.

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 130873600 + 80120401 = 11440^2 + 8951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210994001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210994061) 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, 5366 + ... + 21231.

It is an arithmetic number, because the mean of its divisors is an integer number (52757133).

Almost surely, 2^210994001 is an apocalyptic number.

It is an amenable number.

210994001 is a deficient number, since it is larger than the sum of its proper divisors (34531).

210994001 is an equidigital number, since it uses as much as digits as its factorization.

210994001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34530.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 210994001 is about 14525.6325507704. The cubic root of 210994001 is about 595.3285392229.

The spelling of 210994001 in words is "two hundred ten million, nine hundred ninety-four thousand, one".